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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../extensions.html">Extensions</a></li><li><a href="index.html">basicinform</a></li><li><b>Phrase Definitions</b></li></ul></div>
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<p class="purpose">The phrases making up the basic Inform language, and in terms of which all other phrases and rules are defined.</p>
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<ul class="toc"><li><a href="S-pd.html#SP4">§4. Say phrases</a></li><li><a href="S-pd.html#SP13">§13. Variables</a></li><li><a href="S-pd.html#SP16">§16. Arithmetic</a></li><li><a href="S-pd.html#SP22">§22. Control structures</a></li><li><a href="S-pd.html#SP30">§30. Values</a></li><li><a href="S-pd.html#SP33">§33. Text</a></li><li><a href="S-pd.html#SP38">§38. Adaptive text</a></li><li><a href="S-pd.html#SP39">§39. Data Structures</a></li><li><a href="S-pd.html#SP42">§42. Lists</a></li><li><a href="S-pd.html#SP48">§48. Functional Programming</a></li><li><a href="S-pd.html#SP50">§50. Rulebooks and Activities</a></li><li><a href="S-pd.html#SP54">§54. External Files</a></li><li><a href="S-pd.html#SP57">§57. Use Options</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b>All phrases of the Inform language itself are defined here. The Standard
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Rules extension adds more, specialised for interactive fiction creation,
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but the bones of the language are here. For example, we will define what
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the plus sign will mean, and how Inform should compile "say N in words",
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where N is a number. Inform has no phrase definitions built in, as such;
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but it does contain assumptions about control structures such as "say ...",
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"repeat ...", "let ...", "otherwise ..." and so on will behave. Those, we
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would not be able to redefine in fundamentally different ways. In most
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respects, though, we are more or less free to define any language we like.
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</p>
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<p class="commentary">At first sight, these phrase definitions look little more than simple
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transliterations, and this was one source of early criticism of Inform 7.
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Phrases appeared to have very simplistic definitions, with the natural
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language simply being a verbose description of obviously equivalent C-like
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code. However, the simplicity is misleading, because the definitions below
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tend to conceal where the complexity of the translation process suddenly
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increases. If the preamble includes "(c - condition)", and the definition
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includes the expansion <span class="extract"><span class="extract-syntax">{c}</span></span>, then the text forming c is translated in a way
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much more profound than any simple substitution process could describe.
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Type-checking also complicates the code produced below, since Inform
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automatically generates the code needed to perform run-time type checking at
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any point where doubt remains as to the phrase definition which must be used.
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</p>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>Many of these phrases have what are called inline definitions, written
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using the <span class="extract"><span class="extract-syntax">(-</span></span> and <span class="extract"><span class="extract-syntax">-)</span></span> notation. Non-inline phrases are compiled as
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functions, which are then called when they need to be used. For example,
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"To say the magic number: say 17." compiles to a function, and when
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another phrase includes the instruction "say the magic number", that
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instruction compiles a call to this function. But an inline phrase
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instead generates Inter instructions to do something directly. (That
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something may in fact still be just a function call, but not always.)
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The Inter code to be generated is expressed by the contents of the
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definition between the <span class="extract"><span class="extract-syntax">(-</span></span> and <span class="extract"><span class="extract-syntax">-)</span></span> markers, and is written in a
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marked-up form of Inform 6 notation. This is much more concise and
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readable than if the Inter code were written out longhand, but it may
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give the misleading impression that Inform inline definitions can only
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produce Inform 6 code. That is not so: they produce Inter code, which
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can then be translated as needed.
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</p>
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<p class="commentary">Most of the definitions here also have annotations to positions in the
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main Inform documentation: for example, <span class="extract"><span class="extract-syntax">(documented at phs_s)</span></span>. This has
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no effect on the code compiled, and is used only when Inform generates
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certain problem messages; if the source text misuses the phrase, the problem
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can then give a reference to the relevant documentation. <span class="extract"><span class="extract-syntax">phs_s</span></span> is a
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typical example of a "documentation token", and is only a label. See the
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source of the Inform documentation for how this markup is done.
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</p>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b>Unit tests for the phrases below have test case names beginning <span class="extract"><span class="extract-syntax">BIP-</span></span>,
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which stands for "Basic Inform phrase". In fact, these come in pairs, one for
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each virtual machine we customarily generate code to. For example, <span class="extract"><span class="extract-syntax">BIP-Say</span></span>
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tests the "say" phrase for the Z-machine target, and <span class="extract"><span class="extract-syntax">BIP-Say-G</span></span> does the same
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for the Glulx target. But in the commentary below, test cases will be listed
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only once.
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</p>
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<p class="commentary">It follows that running <span class="extract"><span class="extract-syntax">intest -from inform7 BIP-%c+</span></span> will test all of
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these phrases on all platforms, since this regular expression matches all
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test case names beginning with "BIP-".
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</p>
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<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. Say phrases. </b>We begin with saying phrases: the very first phrase to exist is the one
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printing a single value — literal text, a number, a time, an object, or
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really almost anything, since the vast majority of kinds in Inform are
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sayable. There used to be separate definitions for saying text, numbers
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and unicode characters here, but they were removed in June 2015 as being
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redundant. Though they did no harm, they made some problem messages longer
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than necessary by obliging them to cite a longer list of possible readings
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of a misread phrase.
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</p>
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<p class="commentary">The three inline definitions here neatly demonstrate the three sorts of
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things which appear inside <span class="extract"><span class="extract-syntax">(-</span></span> and <span class="extract"><span class="extract-syntax">-)</span></span>. The definition for "To say s",
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which looks more familiar as the "[s]" text substitution, is straightforwardly
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Inform 6 notation. The definition for "To say (something - number) in words"
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is I6 notation except for the <span class="extract"><span class="extract-syntax">{something}</span></span> part in braces: this expands
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to the value used by the code causing compilation. For example, if the code
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to be compiled is "say 17 in words" then <span class="extract"><span class="extract-syntax">{something}</span></span> here would expand to
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the constant 17. The definition for "To say (val)" is much more complex than
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I6 notation could convey, and so a more complex escape notation is needed,
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<span class="extract"><span class="extract-syntax">{-say:val:K}</span></span>, which tells Inform to compile code which will say <span class="extract"><span class="extract-syntax">val</span></span> with
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whatever method is appropriate to its kind <span class="extract"><span class="extract-syntax">K</span></span>. For documentation on these
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escape notations, see the core Inform source code.
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</p>
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<p class="commentary">The global variable <span class="extract"><span class="extract-syntax">say__n</span></span> tracks the last number printed. For the "in
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words" definition, we need to set it by hand, since Inform doesn't otherwise
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realise that number-printing is what we are doing here. For definitions of
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functions such as <span class="extract"><span class="extract-syntax">STextSubstitution</span></span>, see the source for <span class="extract"><span class="extract-syntax">BasicInformKit</span></span>,
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which is also where <span class="extract"><span class="extract-syntax">say__n</span></span> is defined.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Say</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Part</span><span class="plain-syntax"> </span><span class="identifier-syntax">Three</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Phrasebook</span>
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<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span>
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span><span class="plain-syntax"> </span><span class="identifier-syntax">Values</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sayable</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_say</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">say</span><span class="plain-syntax">:</span><span class="identifier-syntax">val</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">} -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">something</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">words</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_numwords</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">print</span><span class="plain-syntax"> (</span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">say__n</span><span class="plain-syntax">=({</span><span class="identifier-syntax">something</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">s</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_s</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">STextSubstitution</span><span class="plain-syntax">(); -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. </b>"Showme" is a debugging version of "say" which can print some version of
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the value, and the kind, of just about anything.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Showme</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">showme</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_showme</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">show</span><span class="plain-syntax">-</span><span class="identifier-syntax">me</span><span class="plain-syntax">:</span><span class="identifier-syntax">val</span><span class="plain-syntax">} -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>§6. </b>Objects are the most difficult things to say, because of the elaborate
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apparatus for managing their natural-language representations. In particular,
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we need to say them with a definite or indefinite article, which can either
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be capitalised or not, and as part of that we need to keep track of whether
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they are proper nouns; in languages other than English, there are also gender
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and case to worry about.
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</p>
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<p class="commentary">Note that "To say ..." phrases are case sensitive on the first word, so that
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"to say a something" and "to say A something" are different.
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</p>
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<p class="commentary">A curiosity of Inform 6's syntax, arising I think mostly from the need to
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save property memory in "Curses" (1993), the work of IF for which Inform 1
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had been created, is that it lacks a <span class="extract"><span class="extract-syntax">print (A) ...</span></span> statement. The omission
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is made good by using a routine in the template library instead.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-SayName</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span><span class="plain-syntax"> </span><span class="identifier-syntax">Names</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> (</span><span class="identifier-syntax">something</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_a</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">print</span><span class="plain-syntax"> (</span><span class="identifier-syntax">a</span><span class="plain-syntax">) {</span><span class="identifier-syntax">something</span><span class="plain-syntax">}; -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax"> (</span><span class="identifier-syntax">something</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_a</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">print</span><span class="plain-syntax"> (</span><span class="identifier-syntax">a</span><span class="plain-syntax">) {</span><span class="identifier-syntax">something</span><span class="plain-syntax">}; -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">A</span><span class="plain-syntax"> (</span><span class="identifier-syntax">something</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_A</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">CIndefArt</span><span class="plain-syntax">({</span><span class="identifier-syntax">something</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">An</span><span class="plain-syntax"> (</span><span class="identifier-syntax">something</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_A</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">CIndefArt</span><span class="plain-syntax">({</span><span class="identifier-syntax">something</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">something</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_the</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">print</span><span class="plain-syntax"> (</span><span class="identifier-syntax">the</span><span class="plain-syntax">) {</span><span class="identifier-syntax">something</span><span class="plain-syntax">}; -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">The</span><span class="plain-syntax"> (</span><span class="identifier-syntax">something</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_The</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">print</span><span class="plain-syntax"> (</span><span class="identifier-syntax">The</span><span class="plain-syntax">) {</span><span class="identifier-syntax">something</span><span class="plain-syntax">}; -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>§7. </b>Now some text substitutions which are the equivalent of escape characters.
|
|
(In double-quoted I6 text, the notation for a literal quotation mark is a
|
|
tilde <span class="extract"><span class="extract-syntax">~</span></span>.) Note the use of the "-- running on" annotation, which tells Inform
|
|
that a text substitution should not cause a new-line.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-SaySpecial</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span><span class="plain-syntax"> </span><span class="identifier-syntax">Special</span><span class="plain-syntax"> </span><span class="identifier-syntax">Characters</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">bracket</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_bracket</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"["</span><span class="plain-syntax">; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">close</span><span class="plain-syntax"> </span><span class="identifier-syntax">bracket</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_closebracket</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"]"</span><span class="plain-syntax">; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">apostrophe</span><span class="plain-syntax">/' -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_apostrophe</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"'"</span><span class="plain-syntax">; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">quotation</span><span class="plain-syntax"> </span><span class="identifier-syntax">mark</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_quotemark</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"~"</span><span class="plain-syntax">; -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>§8. </b>For an explanation of the paragraph breaking algorithm, see the template
|
|
file "Printing.i6t".
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-SayParagraphing</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span><span class="plain-syntax"> </span><span class="identifier-syntax">Line</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Paragraph</span><span class="plain-syntax"> </span><span class="identifier-syntax">Breaks</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">line</span><span class="plain-syntax"> </span><span class="identifier-syntax">break</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_linebreak</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">new_line</span><span class="plain-syntax">; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">no</span><span class="plain-syntax"> </span><span class="identifier-syntax">line</span><span class="plain-syntax"> </span><span class="identifier-syntax">break</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_nolinebreak</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">do</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax">.</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">conditional</span><span class="plain-syntax"> </span><span class="identifier-syntax">paragraph</span><span class="plain-syntax"> </span><span class="identifier-syntax">break</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_condparabreak</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">DivideParagraphPoint</span><span class="plain-syntax">(); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">paragraph</span><span class="plain-syntax"> </span><span class="identifier-syntax">break</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_parabreak</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">DivideParagraphPoint</span><span class="plain-syntax">(); </span><span class="identifier-syntax">new_line</span><span class="plain-syntax">; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">run</span><span class="plain-syntax"> </span><span class="identifier-syntax">paragraph</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_runparaon</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">RunParagraphOn</span><span class="plain-syntax">(); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">paragraph</span><span class="plain-syntax"> </span><span class="identifier-syntax">break</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">pending</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_breakpending</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- (</span><span class="identifier-syntax">say__p</span><span class="plain-syntax">) -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>§9. </b>Now for "[if ...]", which expands into a rather assembly-language-like
|
|
usage of <span class="extract"><span class="extract-syntax">jump</span></span> statements, I6's form of goto. For instance, the text
|
|
"[if the score is 10]It's ten![otherwise]It's not ten, alas." compiles
|
|
thus:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (~~(</span><span class="identifier-syntax">score</span><span class="plain-syntax"> == </span><span class="constant-syntax">10</span><span class="plain-syntax">)) </span><span class="reserved-syntax">jump</span><span class="plain-syntax"> </span><span class="identifier-syntax">L_Say3</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">jump</span><span class="plain-syntax"> </span><span class="identifier-syntax">L_SayX2</span><span class="plain-syntax">; .</span><span class="identifier-syntax">L_Say3</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
<span class="plain-syntax"> .</span><span class="identifier-syntax">L_Say4</span><span class="plain-syntax">; .</span><span class="identifier-syntax">L_SayX2</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<p class="commentary">Though labels actually have local namespaces in I6 routines, we use
|
|
globally unique labels throughout the whole program: compiling the same
|
|
phrase again would involve say labels 5 and 6 and "say exit" label 3.
|
|
This example text demonstrates the reason we <span class="extract"><span class="extract-syntax">jump</span></span> about, rather than
|
|
making use of <span class="extract"><span class="extract-syntax">if... else...</span></span> and bracing groups of statements: it is legal
|
|
in I7 either to conclude with or to omit the "[end if]". (If statements
|
|
in I6 compile to jump instructions in any event, and on our virtual
|
|
machines there is no speed penalty for branches.) We also need the same
|
|
definitions to accommodate what amounts to a switch statement. The trickier
|
|
text "[if the score is 10]It's ten![otherwise if the score is 8]It's
|
|
eight?[otherwise]It's not ten, alas." comes out as:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (~~(</span><span class="identifier-syntax">score</span><span class="plain-syntax"> == </span><span class="constant-syntax">10</span><span class="plain-syntax">)) </span><span class="reserved-syntax">jump</span><span class="plain-syntax"> </span><span class="identifier-syntax">L_Say5</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">jump</span><span class="plain-syntax"> </span><span class="identifier-syntax">L_SayX3</span><span class="plain-syntax">; .</span><span class="identifier-syntax">L_Say5</span><span class="plain-syntax">; </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (~~(</span><span class="identifier-syntax">score</span><span class="plain-syntax"> == </span><span class="constant-syntax">8</span><span class="plain-syntax">)) </span><span class="reserved-syntax">jump</span><span class="plain-syntax"> </span><span class="identifier-syntax">L_Say6</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">jump</span><span class="plain-syntax"> </span><span class="identifier-syntax">L_SayX3</span><span class="plain-syntax">; .</span><span class="identifier-syntax">L_Say6</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
<span class="plain-syntax"> .</span><span class="identifier-syntax">L_Say7</span><span class="plain-syntax">; .</span><span class="identifier-syntax">L_SayX3</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<p class="commentary">In either form of the construct, control passes into at most one of the
|
|
pieces of text. The terminal labels (the two on the final line) are
|
|
automatically generated; often — when there is a simple "otherwise" or
|
|
"end if" to conclude the construct — they are not needed, but labels are
|
|
quick to process in I6, are soon discarded from I6's memory when not needed
|
|
any more, and compile no code.
|
|
</p>
|
|
|
|
<p class="commentary">We assume in each case that the next say label number to be free is always
|
|
the start of the next block, and that the next say exit label number is always
|
|
the one at the end of the current construct. This is true because Inform does
|
|
not allow "say if" to be nested.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-SayIf</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span><span class="plain-syntax"> </span><span class="identifier-syntax">If</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Otherwise</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="identifier-syntax">condition</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_if</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (~~({</span><span class="identifier-syntax">c</span><span class="plain-syntax">})) </span><span class="identifier-syntax">jump</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">unless</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="identifier-syntax">condition</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_unless</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> ({</span><span class="identifier-syntax">c</span><span class="plain-syntax">}) </span><span class="identifier-syntax">jump</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">otherwise</span><span class="plain-syntax">/</span><span class="identifier-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="identifier-syntax">condition</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_elseif</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">jump</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">SayX</span><span class="plain-syntax">}; .{-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}; </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (~~({</span><span class="identifier-syntax">c</span><span class="plain-syntax">})) </span><span class="identifier-syntax">jump</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">otherwise</span><span class="plain-syntax">/</span><span class="identifier-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">unless</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="identifier-syntax">condition</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_elseunless</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">jump</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">SayX</span><span class="plain-syntax">}; .{-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}; </span><span class="identifier-syntax">if</span><span class="plain-syntax"> ({</span><span class="identifier-syntax">c</span><span class="plain-syntax">}) </span><span class="identifier-syntax">jump</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">otherwise</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_otherwise</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">jump</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">SayX</span><span class="plain-syntax">}; .{-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">else</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_otherwise</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">jump</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">SayX</span><span class="plain-syntax">}; .{-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_endif</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> .{-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}; .{-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">SayX</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">SayX</span><span class="plain-syntax">};</span>
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<span class="plain-syntax"> -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">unless</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_endunless</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> .{-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">Say</span><span class="plain-syntax">}; .{-</span><span class="identifier-syntax">label</span><span class="plain-syntax">:</span><span class="identifier-syntax">SayX</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">SayX</span><span class="plain-syntax">};</span>
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|
<span class="plain-syntax"> -).</span>
|
|
</pre>
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|
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>§10. </b>The other control structure: the random variations form of saying. This
|
|
part of the Inform design was in effect contributed by the community: it
|
|
reimplements a form of Jon Ingold's former extension Text Variations, which
|
|
itself built on code going back to the days of I6.
|
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</p>
|
|
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|
<p class="commentary">The head phrase has one of the most complicated definitions suppled with
|
|
Inform, but is actually documented fairly explicitly in the Extensions chapter
|
|
of "Writing with Inform", so we won't repeat all that here. Essentially it
|
|
uses its own allocated cell of storage in an array to remember a state between
|
|
uses, and compiles as a switch statement based on the current state.
|
|
</p>
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|
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-SayOneOf</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span><span class="plain-syntax"> </span><span class="identifier-syntax">one</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span>
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|
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">one</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">beginning</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_oneof</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">makes</span><span class="plain-syntax">-</span><span class="identifier-syntax">array</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">makes</span><span class="plain-syntax">-</span><span class="identifier-syntax">array</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_flag</span><span class="plain-syntax">}</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> ({-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">storage</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_flag</span><span class="plain-syntax">}-->{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_flag</span><span class="plain-syntax">} == </span><span class="identifier-syntax">false</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">storage</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax">}-->{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax">} = {-</span><span class="identifier-syntax">final</span><span class="plain-syntax">-</span><span class="identifier-syntax">segment</span><span class="plain-syntax">-</span><span class="identifier-syntax">marker</span><span class="plain-syntax">}({-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">storage</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax">}-->{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">segment</span><span class="plain-syntax">-</span><span class="identifier-syntax">count</span><span class="plain-syntax">});</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">storage</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_flag</span><span class="plain-syntax">}-->{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_flag</span><span class="plain-syntax">} = </span><span class="identifier-syntax">true</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">say__comp</span><span class="plain-syntax"> == </span><span class="identifier-syntax">false</span><span class="plain-syntax">) {-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">storage</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_flag</span><span class="plain-syntax">}-->{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_flag</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_flag</span><span class="plain-syntax">} = </span><span class="identifier-syntax">false</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">switch</span><span class="plain-syntax"> (({-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">storage</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax">}-->{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax">})%({-</span><span class="identifier-syntax">segment</span><span class="plain-syntax">-</span><span class="identifier-syntax">count</span><span class="plain-syntax">}+1)-1)</span>
|
|
<span class="plain-syntax">{-</span><span class="identifier-syntax">open</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">: -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">or</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">continuing</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_or</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- @</span><span class="identifier-syntax">nop</span><span class="plain-syntax">; {-</span><span class="identifier-syntax">segment</span><span class="plain-syntax">-</span><span class="identifier-syntax">count</span><span class="plain-syntax">}: -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax"> </span><span class="identifier-syntax">I7_SOO_RAN</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_random</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">purely</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax"> </span><span class="identifier-syntax">I7_SOO_PAR</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_purelyrandom</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">then</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax"> </span><span class="identifier-syntax">I7_SOO_TRAN</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_thenrandom</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">then</span><span class="plain-syntax"> </span><span class="identifier-syntax">purely</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax"> </span><span class="identifier-syntax">I7_SOO_TPAR</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_thenpurelyrandom</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">sticky</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax"> </span><span class="identifier-syntax">I7_SOO_STI</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_sticky</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">as</span><span class="plain-syntax"> </span><span class="identifier-syntax">decreasingly</span><span class="plain-syntax"> </span><span class="identifier-syntax">likely</span><span class="plain-syntax"> </span><span class="identifier-syntax">outcomes</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax"> </span><span class="identifier-syntax">I7_SOO_TAP</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_decreasing</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> </span><span class="identifier-syntax">order</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax"> </span><span class="identifier-syntax">I7_SOO_SHU</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_order</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">cycling</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax"> </span><span class="identifier-syntax">I7_SOO_CYC</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_cycling</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">stopping</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_one_of</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax"> </span><span class="identifier-syntax">I7_SOO_STOP</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_stopping</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">time</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">beginning</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_first_time</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_firsttime</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">makes</span><span class="plain-syntax">-</span><span class="identifier-syntax">array</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_first_time</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">say__comp</span><span class="plain-syntax"> == </span><span class="identifier-syntax">false</span><span class="plain-syntax">) && (({-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">storage</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_first_time</span><span class="plain-syntax">}-->{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_first_time</span><span class="plain-syntax">}{-</span><span class="identifier-syntax">counter</span><span class="plain-syntax">-</span><span class="identifier-syntax">up</span><span class="plain-syntax">:</span><span class="identifier-syntax">say_first_time</span><span class="plain-syntax">})++ == </span><span class="constant-syntax">0</span><span class="plain-syntax">)) {-</span><span class="identifier-syntax">open</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">ending</span><span class="plain-syntax"> </span><span class="identifier-syntax">say_first_time</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_firsttime</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">close</span><span class="plain-syntax">-</span><span class="identifier-syntax">brace</span><span class="plain-syntax">} -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP11" class="paragraph-anchor"></a><b>§11. </b>Now some visual effects, which may or may not be rendered the way the user
|
|
hopes: that's partly up to the virtual machine, unfortunately.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-SayFonts</span></span>, though since <span class="extract"><span class="extract-syntax">intest</span></span> runs on plain text only,
|
|
you may need to run this in the Inform application to be convinced.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span><span class="plain-syntax"> </span><span class="identifier-syntax">Fonts</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Visual</span><span class="plain-syntax"> </span><span class="identifier-syntax">Effects</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">bold</span><span class="plain-syntax"> </span><span class="identifier-syntax">type</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_bold</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">style</span><span class="plain-syntax"> </span><span class="identifier-syntax">bold</span><span class="plain-syntax">; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">italic</span><span class="plain-syntax"> </span><span class="identifier-syntax">type</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_italic</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">style</span><span class="plain-syntax"> </span><span class="identifier-syntax">underline</span><span class="plain-syntax">; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">roman</span><span class="plain-syntax"> </span><span class="identifier-syntax">type</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_roman</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">style</span><span class="plain-syntax"> </span><span class="identifier-syntax">roman</span><span class="plain-syntax">; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">fixed</span><span class="plain-syntax"> </span><span class="identifier-syntax">letter</span><span class="plain-syntax"> </span><span class="identifier-syntax">spacing</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_fixedspacing</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">font</span><span class="plain-syntax"> </span><span class="identifier-syntax">off</span><span class="plain-syntax">; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax"> </span><span class="identifier-syntax">letter</span><span class="plain-syntax"> </span><span class="identifier-syntax">spacing</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_varspacing</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">font</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax">; -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP12" class="paragraph-anchor"></a><b>§12. </b>These are lists in the sense of the "list of" kind of value constructor, and
|
|
the first two phrases here might list any values, not just objects.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-SayLists</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">8</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span><span class="plain-syntax"> </span><span class="identifier-syntax">Lists</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Values</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">brace</span><span class="plain-syntax"> </span><span class="identifier-syntax">notation</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_listbraced</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Say</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">objects</span><span class="plain-syntax">) </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">definite</span><span class="plain-syntax"> </span><span class="identifier-syntax">articles</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_listdef</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Say</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="constant-syntax">2</span><span class="plain-syntax">); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">objects</span><span class="plain-syntax">) </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">indefinite</span><span class="plain-syntax"> </span><span class="identifier-syntax">articles</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_listindef</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Say</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="constant-syntax">3</span><span class="plain-syntax">); -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP13" class="paragraph-anchor"></a><b>§13. Variables. </b>The "now" phrase can do an extraordinary range of things, and is more or
|
|
less a genie granting one wish.
|
|
</p>
|
|
|
|
<p class="commentary">The "whether or not" phrase exists only to convert a condition to a value,
|
|
and is needed because I7 does not silently cast from one to the other in
|
|
the way that C would.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Now</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Conditions</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Variables</span>
|
|
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Conditions</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">now</span><span class="plain-syntax"> (</span><span class="identifier-syntax">cn</span><span class="plain-syntax"> - </span><span class="identifier-syntax">condition</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_now</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {</span><span class="identifier-syntax">cn</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">truth</span><span class="plain-syntax"> </span><span class="identifier-syntax">state</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">whether</span><span class="plain-syntax"> </span><span class="identifier-syntax">or</span><span class="plain-syntax"> </span><span class="identifier-syntax">not</span><span class="plain-syntax"> (</span><span class="identifier-syntax">C</span><span class="plain-syntax"> - </span><span class="identifier-syntax">condition</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_whether</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({</span><span class="identifier-syntax">C</span><span class="plain-syntax">}) -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP14" class="paragraph-anchor"></a><b>§14. </b>Assignment is probably the most difficult thing the type-checker has to
|
|
cope with, since "let" has to work when applied to both unknown names (it
|
|
creates a new variable) and existing ones (kind of value permitting). There
|
|
are also four different ways to create with "let", and two to use
|
|
existing variables. Note that the "given by" forms are not strictly
|
|
speaking assignments at all; the value placed in <span class="extract"><span class="extract-syntax">t</span></span> is found by solving
|
|
the equation <span class="extract"><span class="extract-syntax">Q</span></span>. This does require special typechecking, but of a
|
|
different kind to that requested by "(assignment operation)". All of which
|
|
makes the "To let" section here only slightly shorter than John Galsworthy's
|
|
Forsyte novel of the same name.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Let</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Assigning</span><span class="plain-syntax"> </span><span class="identifier-syntax">Temporary</span><span class="plain-syntax"> </span><span class="identifier-syntax">Variables</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nonexisting</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">) </span><span class="identifier-syntax">be</span><span class="plain-syntax"> (</span><span class="identifier-syntax">u</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">assignment</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_let</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">unprotect</span><span class="plain-syntax">:</span><span class="identifier-syntax">t</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">copy</span><span class="plain-syntax">:</span><span class="identifier-syntax">t</span><span class="plain-syntax">:</span><span class="identifier-syntax">u</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nonexisting</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">) </span><span class="identifier-syntax">be</span><span class="plain-syntax"> (</span><span class="identifier-syntax">u</span><span class="plain-syntax"> - </span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">assignment</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_letdefault</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">unprotect</span><span class="plain-syntax">:</span><span class="identifier-syntax">t</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">initialise</span><span class="plain-syntax">:</span><span class="identifier-syntax">t</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nonexisting</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">) </span><span class="identifier-syntax">be</span><span class="plain-syntax"> (</span><span class="identifier-syntax">u</span><span class="plain-syntax"> - </span><span class="identifier-syntax">description</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">relations</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">assignment</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_letrelation</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">unprotect</span><span class="plain-syntax">:</span><span class="identifier-syntax">t</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">initialise</span><span class="plain-syntax">:</span><span class="identifier-syntax">t</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">now</span><span class="plain-syntax">-</span><span class="identifier-syntax">matches</span><span class="plain-syntax">-</span><span class="identifier-syntax">description</span><span class="plain-syntax">:</span><span class="identifier-syntax">t</span><span class="plain-syntax">:</span><span class="identifier-syntax">u</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nonexisting</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">) </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">given</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Q</span><span class="plain-syntax"> - </span><span class="identifier-syntax">equation</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_letequation</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">unprotect</span><span class="plain-syntax">:</span><span class="identifier-syntax">t</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">solve</span><span class="plain-syntax">-</span><span class="identifier-syntax">equation</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax"> - </span><span class="identifier-syntax">existing</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">) </span><span class="identifier-syntax">be</span><span class="plain-syntax"> (</span><span class="identifier-syntax">u</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">assignment</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_let</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">copy</span><span class="plain-syntax">:</span><span class="identifier-syntax">t</span><span class="plain-syntax">:</span><span class="identifier-syntax">u</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax"> - </span><span class="identifier-syntax">existing</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">) </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">given</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Q</span><span class="plain-syntax"> - </span><span class="identifier-syntax">equation</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_letequation</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">solve</span><span class="plain-syntax">-</span><span class="identifier-syntax">equation</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP15" class="paragraph-anchor"></a><b>§15. </b>It is not explicit in the following definitions that Inform should typecheck
|
|
that the values held by these storage objects can be incremented or decremented
|
|
(as an object, say, cannot, but a number can): Inform nevertheless contains
|
|
code which does this.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Increase</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Increase</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Decrease</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">increase</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> - </span><span class="identifier-syntax">storage</span><span class="plain-syntax">) </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">w</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">assignment</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_increase</span><span class="plain-syntax">): (-</span>
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|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">copy</span><span class="plain-syntax">:</span><span class="identifier-syntax">S</span><span class="plain-syntax">:+</span><span class="identifier-syntax">w</span><span class="plain-syntax">};</span>
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<span class="plain-syntax"> -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decrease</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> - </span><span class="identifier-syntax">storage</span><span class="plain-syntax">) </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">w</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">assignment</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_decrease</span><span class="plain-syntax">): (-</span>
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|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">copy</span><span class="plain-syntax">:</span><span class="identifier-syntax">S</span><span class="plain-syntax">:-</span><span class="identifier-syntax">w</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">increment</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> - </span><span class="identifier-syntax">storage</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_increment</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">copy</span><span class="plain-syntax">:</span><span class="identifier-syntax">S</span><span class="plain-syntax">:+};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decrement</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> - </span><span class="identifier-syntax">storage</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_decrement</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">copy</span><span class="plain-syntax">:</span><span class="identifier-syntax">S</span><span class="plain-syntax">:-};</span>
|
|
<span class="plain-syntax"> -).</span>
|
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</pre>
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<p class="commentary firstcommentary"><a id="SP16" class="paragraph-anchor"></a><b>§16. Arithmetic. </b>There are nine arithmetic operations, internally numbered 0 upwards, and
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given verbal forms below. These are handled unusually in the type-checker
|
|
because they need to be more polymorphic than most phrases: Inform uses
|
|
dimension-checking to determine the kind of value resulting. (Thus a
|
|
height times a number is another height, and so on.)
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</p>
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<p class="commentary">The totalling code (12) is not structly to do with arithmetic in the same
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way, but it's needed to flag the phrase for the Inform typechecker's special
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attention.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-ArithmeticOperations</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Arithmetic</span>
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">Operations</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) + (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_plus</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) </span><span class="identifier-syntax">plus</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_plus</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) - (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_minus</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) </span><span class="identifier-syntax">minus</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_minus</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) * (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_times</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) </span><span class="identifier-syntax">times</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_times</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) </span><span class="identifier-syntax">multiplied</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_times</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) / (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_divide</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) </span><span class="identifier-syntax">divided</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_divide</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">remainder</span><span class="plain-syntax"> </span><span class="identifier-syntax">after</span><span class="plain-syntax"> </span><span class="identifier-syntax">dividing</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_remainder</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">nearest</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_nearest</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">:</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">square</span><span class="plain-syntax"> </span><span class="identifier-syntax">root</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_squareroot</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">}) -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">cube</span><span class="plain-syntax"> </span><span class="identifier-syntax">root</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">8</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_cuberoot</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax">-</span><span class="identifier-syntax">operation</span><span class="plain-syntax">:</span><span class="identifier-syntax">X</span><span class="plain-syntax">}) -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">total</span><span class="plain-syntax"> (</span><span class="identifier-syntax">p</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">valued</span><span class="plain-syntax"> </span><span class="identifier-syntax">property</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> - </span><span class="identifier-syntax">description</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">12</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_total</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">total</span><span class="plain-syntax">-</span><span class="identifier-syntax">of</span><span class="plain-syntax">} -).</span>
|
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</pre>
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<p class="commentary firstcommentary"><a id="SP17" class="paragraph-anchor"></a><b>§17. </b>Real numbers are not available in the Z-machine, but they are likely to
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be available everywhere else, i.e., on any other platform Inform may target
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in future.
|
|
</p>
|
|
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-SayRealNumbers-G</span></span>, which has no Z-machine counterpart.
|
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</p>
|
|
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|
<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Saying</span><span class="plain-syntax"> </span><span class="identifier-syntax">Real</span><span class="plain-syntax"> </span><span class="identifier-syntax">Numbers</span><span class="plain-syntax"> (</span><span class="identifier-syntax">not</span><span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z</span><span class="plain-syntax">-</span><span class="identifier-syntax">machine</span><span class="plain-syntax">)</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">decimal</span><span class="plain-syntax"> </span><span class="identifier-syntax">places</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_realplaces</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">Float</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">decimal</span><span class="plain-syntax"> </span><span class="identifier-syntax">notation</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_decimal</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FloatDec</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">decimal</span><span class="plain-syntax"> </span><span class="identifier-syntax">places</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">decimal</span><span class="plain-syntax"> </span><span class="identifier-syntax">notation</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_decimalplaces</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FloatDec</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}); -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">scientific</span><span class="plain-syntax"> </span><span class="identifier-syntax">notation</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_scientific</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FloatExp</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}); -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">decimal</span><span class="plain-syntax"> </span><span class="identifier-syntax">places</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">scientific</span><span class="plain-syntax"> </span><span class="identifier-syntax">notation</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_scientificplaces</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FloatExp</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}); -).</span>
|
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</pre>
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<p class="commentary firstcommentary"><a id="SP18" class="paragraph-anchor"></a><b>§18. </b>A number of miscellaneous mathematical functions follow, for real
|
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numbers only; these are tested as part of <span class="extract"><span class="extract-syntax">BIP-ArithmeticOperations-G</span></span>,
|
|
already mentioned above. Note that we do not need to define real versions
|
|
of addition, multiplication and so on: the above definitions are polymorphic
|
|
enough to have done that already.
|
|
</p>
|
|
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<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Real</span><span class="plain-syntax"> </span><span class="identifier-syntax">Arithmetic</span><span class="plain-syntax"> (</span><span class="identifier-syntax">not</span><span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z</span><span class="plain-syntax">-</span><span class="identifier-syntax">machine</span><span class="plain-syntax">)</span>
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|
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">reciprocal</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_reciprocal</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Reciprocal</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">absolute</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_absolutevalue</span><span class="plain-syntax">)</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">abs</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Abs</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">square</span><span class="plain-syntax"> </span><span class="identifier-syntax">root</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">operation</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax">)</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_realsquareroot</span><span class="plain-syntax">)</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">root</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">rsqr</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Root</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">square</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">rsqr</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">root</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">given</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">^2 </span><span class="identifier-syntax">where</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax">.</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">ceiling</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_ceiling</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">ceiling</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Ceiling</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">floor</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_floor</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">floor</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Floor</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">nearest</span><span class="plain-syntax"> </span><span class="identifier-syntax">whole</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_nearestwholenumber</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_to_NUMBER_TY</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP19" class="paragraph-anchor"></a><b>§19. </b>And these are tested in <span class="extract"><span class="extract-syntax">BIP-Exponentials-G</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Exponential</span><span class="plain-syntax"> </span><span class="identifier-syntax">Functions</span><span class="plain-syntax"> (</span><span class="identifier-syntax">not</span><span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z</span><span class="plain-syntax">-</span><span class="identifier-syntax">machine</span><span class="plain-syntax">)</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">natural</span><span class="plain-syntax">/-- </span><span class="identifier-syntax">logarithm</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_logarithm</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">log</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">exp</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Log</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">logarithm</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">base</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_logarithmto</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_BLog</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">exponential</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_exp</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">exp</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">log</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Exp</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">power</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_power</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Pow</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">P</span><span class="plain-syntax">}) -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP20" class="paragraph-anchor"></a><b>§20. </b>And these are tested in <span class="extract"><span class="extract-syntax">BIP-Trigonometry-G</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Trigonometric</span><span class="plain-syntax"> </span><span class="identifier-syntax">Functions</span><span class="plain-syntax"> (</span><span class="identifier-syntax">not</span><span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z</span><span class="plain-syntax">-</span><span class="identifier-syntax">machine</span><span class="plain-syntax">)</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">degrees</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_degrees</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Times</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, $+0.0174532925) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">sine</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sine</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">sin</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">arcsin</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Sin</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">cosine</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_cosine</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">cos</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">arccos</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Cos</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">tangent</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_tangent</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">tan</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">arctan</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Tan</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">arcsine</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_arcsine</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">arcsin</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">sin</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Arcsin</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">arccosine</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_arccosine</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">arccos</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">cos</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Arccos</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">arctangent</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_arctangent</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">arctan</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">tan</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Arctan</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
|
|
</pre>
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|
<p class="commentary firstcommentary"><a id="SP21" class="paragraph-anchor"></a><b>§21. </b>And these are tested in <span class="extract"><span class="extract-syntax">BIP-Hyperbolics-G</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Trigonometric</span><span class="plain-syntax"> </span><span class="identifier-syntax">Functions</span><span class="plain-syntax"> (</span><span class="identifier-syntax">not</span><span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z</span><span class="plain-syntax">-</span><span class="identifier-syntax">machine</span><span class="plain-syntax">)</span>
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|
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">hyperbolic</span><span class="plain-syntax"> </span><span class="identifier-syntax">sine</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_hyperbolicsine</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">sinh</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">arcsinh</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Sinh</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">hyperbolic</span><span class="plain-syntax"> </span><span class="identifier-syntax">cosine</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_hyperboliccosine</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">cosh</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">arccosh</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Cosh</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">hyperbolic</span><span class="plain-syntax"> </span><span class="identifier-syntax">tangent</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_hyperbolictangent</span><span class="plain-syntax">)</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">tanh</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">arctanh</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">REAL_NUMBER_TY_Tanh</span><span class="plain-syntax">({</span><span class="identifier-syntax">R</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">hyperbolic</span><span class="plain-syntax"> </span><span class="identifier-syntax">arcsine</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_hyperbolicarcsine</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">arcsinh</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">sinh</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">given</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> = </span><span class="identifier-syntax">log</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax"> + </span><span class="identifier-syntax">root</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">^2 + </span><span class="constant-syntax">1</span><span class="plain-syntax">)) </span><span class="identifier-syntax">where</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax">.</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">hyperbolic</span><span class="plain-syntax"> </span><span class="identifier-syntax">arccosine</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_hyperbolicarccosine</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">arccosh</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">cosh</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">given</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> = </span><span class="identifier-syntax">log</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax"> + </span><span class="identifier-syntax">root</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">^2 - </span><span class="constant-syntax">1</span><span class="plain-syntax">)) </span><span class="identifier-syntax">where</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax">.</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">hyperbolic</span><span class="plain-syntax"> </span><span class="identifier-syntax">arctangent</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_hyperbolicarctangent</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">this</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">arctanh</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">inverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">tanh</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">given</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">.5*(</span><span class="identifier-syntax">log</span><span class="plain-syntax">(1+</span><span class="identifier-syntax">R</span><span class="plain-syntax">) - </span><span class="identifier-syntax">log</span><span class="plain-syntax">(1-</span><span class="identifier-syntax">R</span><span class="plain-syntax">)) </span><span class="identifier-syntax">where</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">real</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax">.</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP22" class="paragraph-anchor"></a><b>§22. Control structures. </b>The term "control structure" conjures up the thought of conditionals and loops,
|
|
and we'll get to those, but we'll begin with the equivalent of the C language's
|
|
<span class="extract"><span class="extract-syntax">return</span></span> statement: ending a function call with some value as an outcome.
|
|
Inform calls this "deciding" something, since in Inform programs functions
|
|
returning values are usually quite functional: that is, their point is what
|
|
value they return, rather than the side-effects of what they did.
|
|
</p>
|
|
|
|
<p class="commentary">Note that returning a value has to invoke the type-checker to ensure that
|
|
the return value matches the kind of value expected. This certainly rejects
|
|
the phrase if it's used in a definition which isn't meant to be deciding
|
|
a value at all, so an "in... only" clause is not needed.
|
|
</p>
|
|
|
|
<p class="commentary">The IF-form of Inform allows the antique syntaxes "yes" and "no" as
|
|
synonyms for "decide yes" and "decide no"; these are not present in Basic
|
|
Inform, and are defined in the Standard Rules (and only to keep old source
|
|
text working).
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Decide</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Control</span>
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Deciding</span><span class="plain-syntax"> </span><span class="identifier-syntax">Outcomes</span>
|
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">yes</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_yes</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">rtrue</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">no</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_no</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">rfalse</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
|
|
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">stop</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_stop</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">rtrue</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
|
|
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> (</span><span class="identifier-syntax">something</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_decideon</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">return</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">return</span><span class="plain-syntax">-</span><span class="identifier-syntax">value</span><span class="plain-syntax">:</span><span class="identifier-syntax">something</span><span class="plain-syntax">}; -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP23" class="paragraph-anchor"></a><b>§23. </b>While "unless" is supposed to be exactly like "if" but with the reversed
|
|
sense of the condition, that isn't quite true. For example, there is no
|
|
"unless ... then ...": logical it might be, English it is not.
|
|
</p>
|
|
|
|
<p class="commentary">The switch form of "if" is subtly different, and here again "unless" is
|
|
not allowed in its place.
|
|
</p>
|
|
|
|
<p class="commentary">As with some other control structures, the definitions here are somewhat
|
|
partial, and made up for by direct code in the compiler. (There's a limit to
|
|
how much a general syntax for phrases can encode control phrases.)
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-If</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">If</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Unless</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="identifier-syntax">condition</span><span class="plain-syntax">) </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">conditional</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_if</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {</span><span class="identifier-syntax">c</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">unless</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="identifier-syntax">condition</span><span class="plain-syntax">) </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">conditional</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_unless</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- (~~{</span><span class="identifier-syntax">c</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax">) </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">conditional</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_switch</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP24" class="paragraph-anchor"></a><b>§24. </b>"Do nothing" is a curious feature for a high-level programming language (C,
|
|
for example, does not have a NOP function); it entered Inform in the earliest
|
|
days, when it was useful mainly when natural language syntax had painted users
|
|
into a corner. (In the examples, it used to be used when conditions were
|
|
awkward to negate — if condition, do nothing, otherwise blah blah blah — but
|
|
the creation of "unless" made it possible to remove most of the "do
|
|
nothing"s.) It is now hardly ever useful.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">do</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_nothing</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- ; -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP25" class="paragraph-anchor"></a><b>§25. </b>After all that, the while loop is simplicity itself. Perhaps the presence
|
|
of "unless" for "if" argues for a similarly negated form, "until" for
|
|
"while", but users haven't yet petitioned for this.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Loops</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">While</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Repeat</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="identifier-syntax">condition</span><span class="plain-syntax">) </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_while</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">while</span><span class="plain-syntax"> {</span><span class="identifier-syntax">c</span><span class="plain-syntax">} -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP26" class="paragraph-anchor"></a><b>§26. </b>The repeat loop looks like a single construction, but isn't, because the
|
|
range can be given in four fundamentally different ways (and the loop variable
|
|
then has a different kind of value accordingly). First, the equivalents of
|
|
BASIC's <span class="extract"><span class="extract-syntax">for</span></span> loop and of Inform 6's <span class="extract"><span class="extract-syntax">objectloop</span></span>, respectively:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nonexisting</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">v</span><span class="plain-syntax"> - </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">w</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_repeat</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">for</span><span class="plain-syntax"> ({</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax">}={</span><span class="identifier-syntax">v</span><span class="plain-syntax">}: {</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax">}<={</span><span class="identifier-syntax">w</span><span class="plain-syntax">}: {</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax">}++) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nonexisting</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">v</span><span class="plain-syntax"> - </span><span class="identifier-syntax">enumerated</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">w</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_repeat</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">for</span><span class="plain-syntax"> ({</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax">}={</span><span class="identifier-syntax">v</span><span class="plain-syntax">}: {</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax">}<={</span><span class="identifier-syntax">w</span><span class="plain-syntax">}: {</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax">}={-</span><span class="identifier-syntax">next</span><span class="plain-syntax">-</span><span class="identifier-syntax">routine</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}({</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax">})) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nonexisting</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> (</span><span class="identifier-syntax">OS</span><span class="plain-syntax"> - </span><span class="identifier-syntax">description</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_runthrough</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">repeat</span><span class="plain-syntax">-</span><span class="identifier-syntax">through</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nonexisting</span><span class="plain-syntax"> </span><span class="identifier-syntax">object</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_repeatlist</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">repeat</span><span class="plain-syntax">-</span><span class="identifier-syntax">through</span><span class="plain-syntax">-</span><span class="identifier-syntax">list</span><span class="plain-syntax">} -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP27" class="paragraph-anchor"></a><b>§27. </b>The following are all repeats where the range is the set of rows of a table,
|
|
taken in some order, and the repeat variable — though it does exist — is
|
|
never specified since the relevant row is instead the one selected during
|
|
each iteration of the loop.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">) </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_repeattable</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> @</span><span class="identifier-syntax">push</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">}; @</span><span class="identifier-syntax">push</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> ({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}={</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}=1, </span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}:</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}<=</span><span class="identifier-syntax">TableRows</span><span class="plain-syntax">({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}):</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}++, </span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2})</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TableRowIsBlank</span><span class="plain-syntax">(</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">)==</span><span class="identifier-syntax">false</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">block</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> @</span><span class="identifier-syntax">pull</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">}; @</span><span class="identifier-syntax">pull</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">reverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">order</span><span class="plain-syntax"> </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_repeattablereverse</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> @</span><span class="identifier-syntax">push</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">}; @</span><span class="identifier-syntax">push</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> ({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}={</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}=</span><span class="identifier-syntax">TableRows</span><span class="plain-syntax">({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}), </span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}:</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}>=1:</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}--, </span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2})</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TableRowIsBlank</span><span class="plain-syntax">(</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">)==</span><span class="identifier-syntax">false</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">block</span><span class="plain-syntax">}</span>
|
|
<span class="plain-syntax"> @</span><span class="identifier-syntax">pull</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">}; @</span><span class="identifier-syntax">pull</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TC</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">column</span><span class="plain-syntax">) </span><span class="identifier-syntax">order</span><span class="plain-syntax"> </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_repeattablecol</span><span class="plain-syntax">): (-</span>
|
|
<span class="plain-syntax"> @</span><span class="identifier-syntax">push</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">}; @</span><span class="identifier-syntax">push</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">};</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> ({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}={</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}=</span><span class="identifier-syntax">TableNextRow</span><span class="plain-syntax">({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, {</span><span class="identifier-syntax">TC</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">), </span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}:</span>
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<span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}~=0:</span>
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|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}=</span><span class="identifier-syntax">TableNextRow</span><span class="plain-syntax">({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, {</span><span class="identifier-syntax">TC</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}, </span><span class="constant-syntax">1</span><span class="plain-syntax">), </span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2})</span>
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|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">block</span><span class="plain-syntax">}</span>
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|
<span class="plain-syntax"> @</span><span class="identifier-syntax">pull</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">}; @</span><span class="identifier-syntax">pull</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">};</span>
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|
<span class="plain-syntax"> -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">reverse</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TC</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">column</span><span class="plain-syntax">) </span><span class="identifier-syntax">order</span><span class="plain-syntax"> </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_repeattablecolreverse</span><span class="plain-syntax">): (-</span>
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<span class="plain-syntax"> @</span><span class="identifier-syntax">push</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">}; @</span><span class="identifier-syntax">push</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">};</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> ({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}={</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}=</span><span class="identifier-syntax">TableNextRow</span><span class="plain-syntax">({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, {</span><span class="identifier-syntax">TC</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1), </span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}:</span>
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<span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}~=0:</span>
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<span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}=</span><span class="identifier-syntax">TableNextRow</span><span class="plain-syntax">({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, {</span><span class="identifier-syntax">TC</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2}, -1), </span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}, </span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">={-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:2})</span>
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<span class="plain-syntax"> {-</span><span class="identifier-syntax">block</span><span class="plain-syntax">}</span>
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|
<span class="plain-syntax"> @</span><span class="identifier-syntax">pull</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">}; @</span><span class="identifier-syntax">pull</span><span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">};</span>
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<span class="plain-syntax"> -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP28" class="paragraph-anchor"></a><b>§28. </b>And this loops through the lines of a text file stored internally.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nonexisting</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">variable</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> (</span><span class="identifier-syntax">F</span><span class="plain-syntax"> - </span><span class="identifier-syntax">internal</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">) </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span><span class="plain-syntax">:</span>
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<span class="plain-syntax"> (-</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> ({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1} = </span><span class="identifier-syntax">InternalFileIO_Line</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">F</span><span class="plain-syntax">}): {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1}:</span>
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<span class="plain-syntax"> {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:1} = </span><span class="identifier-syntax">InternalFileIO_Line</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">loopvar</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">F</span><span class="plain-syntax">}))</span>
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|
<span class="plain-syntax"> {-</span><span class="identifier-syntax">block</span><span class="plain-syntax">}</span>
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|
<span class="plain-syntax"> -).</span>
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|
</pre>
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|
<p class="commentary firstcommentary"><a id="SP29" class="paragraph-anchor"></a><b>§29. </b>The equivalent of <span class="extract"><span class="extract-syntax">break</span></span> or <span class="extract"><span class="extract-syntax">continue</span></span> in C or I6, or of <span class="extract"><span class="extract-syntax">last</span></span> or <span class="extract"><span class="extract-syntax">next</span></span>
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in Perl. Here "in loop" means "in any of the forms of while or repeat".
|
|
</p>
|
|
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|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Break</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Loop</span><span class="plain-syntax"> </span><span class="identifier-syntax">Flow</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">break</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_break</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">break</span><span class="plain-syntax">} -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">next</span><span class="plain-syntax"> -- </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">loop</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_next</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">continue</span><span class="plain-syntax">; -).</span>
|
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</pre>
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<p class="commentary firstcommentary"><a id="SP30" class="paragraph-anchor"></a><b>§30. Values. </b>Some of the things we can do with enumerations, others being listed under
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randomness below.
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|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Enumerations</span></span>.
|
|
</p>
|
|
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|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Values</span>
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Enumerations</span>
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|
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> - </span><span class="identifier-syntax">description</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numberof</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">number</span><span class="plain-syntax">-</span><span class="identifier-syntax">of</span><span class="plain-syntax">} -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">numerical</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">enumerated</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">): (- {</span><span class="identifier-syntax">X</span><span class="plain-syntax">} -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">sequence</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">enumerated</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">indexing</span><span class="plain-syntax">-</span><span class="identifier-syntax">routine</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}({</span><span class="identifier-syntax">X</span><span class="plain-syntax">}) -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">enumerated</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">after</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_enumafter</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">next</span><span class="plain-syntax">-</span><span class="identifier-syntax">routine</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}({</span><span class="identifier-syntax">X</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">enumerated</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">before</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_enumbefore</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">previous</span><span class="plain-syntax">-</span><span class="identifier-syntax">routine</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}({</span><span class="identifier-syntax">X</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">enumerated</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_enumfirst</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">default</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">.</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">last</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">enumerated</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_enumlast</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">before</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">default</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">.</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP31" class="paragraph-anchor"></a><b>§31. </b>Random numbers and random items chosen from sets of objects matching a
|
|
given description ("a random closed door").
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Randomness</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Randomness</span>
|
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|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax">/-- </span><span class="identifier-syntax">random</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> - </span><span class="identifier-syntax">description</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_randomdesc</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">random</span><span class="plain-syntax">-</span><span class="identifier-syntax">of</span><span class="plain-syntax">} -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">between</span><span class="plain-syntax"> (</span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">and</span><span class="plain-syntax"> (</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_randombetween</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">ranger</span><span class="plain-syntax">-</span><span class="identifier-syntax">routine</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}({</span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">arithmetic</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_randombetween</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">ranger</span><span class="plain-syntax">-</span><span class="identifier-syntax">routine</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}({</span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">enumerated</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">between</span><span class="plain-syntax"> (</span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">and</span><span class="plain-syntax"> (</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_randombetween</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">ranger</span><span class="plain-syntax">-</span><span class="identifier-syntax">routine</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}({</span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">enumerated</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_randombetween</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">ranger</span><span class="plain-syntax">-</span><span class="identifier-syntax">routine</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}({</span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">whether</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> </span><span class="identifier-syntax">chance</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">M</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">succeeds</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_randomchance</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- (</span><span class="identifier-syntax">GenerateRandomNumber</span><span class="plain-syntax">(1, {</span><span class="identifier-syntax">M</span><span class="plain-syntax">}) <= {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">seed</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax">-</span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">generator</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_seed</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">VM_Seed_RNG</span><span class="plain-syntax">({</span><span class="identifier-syntax">N</span><span class="plain-syntax">}); -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP32" class="paragraph-anchor"></a><b>§32. </b>A novel feature of Inform is that there is a default value of any kind: for
|
|
example, it is 0 for a number, or the empty text for text. When Inform compiles
|
|
a value of a given kind but isn't told what value to compile, it always
|
|
chooses the default, which is why the following definition works.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-DefaultValues</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Default</span><span class="plain-syntax"> </span><span class="identifier-syntax">Values</span>
|
|
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">default</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_defaultvalue</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">} -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP33" class="paragraph-anchor"></a><b>§33. Text. </b>Inform programs swim in a sea of texts, and most of the ways to make text
|
|
involve substitutions; so phrases to manipulate text are nice to have, but
|
|
are bonuses rather than being the essentials.
|
|
</p>
|
|
|
|
<p class="commentary">As repetitive as the following is, it's much simpler and less prone to
|
|
possible namespace trouble if we don't define kinds of value for the different
|
|
structural levels of text (character, word, punctuated word, etc.).
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Texts</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Text</span>
|
|
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|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Breaking</span><span class="plain-syntax"> </span><span class="identifier-syntax">down</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">characters</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numchars</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_BlobAccess</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="identifier-syntax">CHR_BLOB</span><span class="plain-syntax">) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">words</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numwords</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_BlobAccess</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="identifier-syntax">WORD_BLOB</span><span class="plain-syntax">) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">punctuated</span><span class="plain-syntax"> </span><span class="identifier-syntax">words</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numpwords</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_BlobAccess</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="identifier-syntax">PWORD_BLOB</span><span class="plain-syntax">) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">unpunctuated</span><span class="plain-syntax"> </span><span class="identifier-syntax">words</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numupwords</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_BlobAccess</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="identifier-syntax">UWORD_BLOB</span><span class="plain-syntax">) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">lines</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numlines</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_BlobAccess</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="identifier-syntax">LINE_BLOB</span><span class="plain-syntax">) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">paragraphs</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numparas</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_BlobAccess</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="identifier-syntax">PARA_BLOB</span><span class="plain-syntax">) -).</span>
|
|
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">character</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_charnum</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_GetBlob</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, </span><span class="identifier-syntax">CHR_BLOB</span><span class="plain-syntax">) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">word</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_wordnum</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_GetBlob</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, </span><span class="identifier-syntax">WORD_BLOB</span><span class="plain-syntax">) -).</span>
|
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">punctuated</span><span class="plain-syntax"> </span><span class="identifier-syntax">word</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_pwordnum</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_GetBlob</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, </span><span class="identifier-syntax">PWORD_BLOB</span><span class="plain-syntax">) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">unpunctuated</span><span class="plain-syntax"> </span><span class="identifier-syntax">word</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_upwordnum</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_GetBlob</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, </span><span class="identifier-syntax">UWORD_BLOB</span><span class="plain-syntax">) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">line</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_linenum</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_GetBlob</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, </span><span class="identifier-syntax">LINE_BLOB</span><span class="plain-syntax">) -).</span>
|
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">paragraph</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_paranum</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_GetBlob</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, </span><span class="identifier-syntax">PARA_BLOB</span><span class="plain-syntax">) -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP34" class="paragraph-anchor"></a><b>§34. </b>The "substituted form of" is a technicality most Inform users never need to
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think about; as a one-off phrase, it may as well go here.
|
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">substituted</span><span class="plain-syntax"> </span><span class="identifier-syntax">form</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_subform</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_SubstitutedForm</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}) -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP35" class="paragraph-anchor"></a><b>§35. </b>A common matching engine is used for matching plain text...
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-TextReplacement</span></span>.
|
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Matching</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Replacing</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">exactly</span><span class="plain-syntax"> </span><span class="identifier-syntax">matches</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">),</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">insensitively</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_exactlymatches</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_Replace_RE</span><span class="plain-syntax">(</span><span class="identifier-syntax">CHR_BLOB</span><span class="plain-syntax">,{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">},{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">},0,{</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">},1) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">matches</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">),</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">insensitively</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_matches</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_Replace_RE</span><span class="plain-syntax">(</span><span class="identifier-syntax">CHR_BLOB</span><span class="plain-syntax">,{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">},{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">},0,{</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">times</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">matches</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">), </span><span class="identifier-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">insensitively</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_nummatches</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_Replace_RE</span><span class="plain-syntax">(</span><span class="identifier-syntax">CHR_BLOB</span><span class="plain-syntax">,{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">},{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">},1,{</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">),</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">insensitively</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replace</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_Replace_RE</span><span class="plain-syntax">(</span><span class="identifier-syntax">CHR_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">},</span>
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<span class="plain-syntax"> {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">word</span><span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">with</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replacewordin</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_ReplaceText</span><span class="plain-syntax">(</span><span class="identifier-syntax">WORD_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">punctuated</span><span class="plain-syntax"> </span><span class="identifier-syntax">word</span><span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replacepwordin</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_ReplaceText</span><span class="plain-syntax">(</span><span class="identifier-syntax">PWORD_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}); -).</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">character</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replacechar</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_ReplaceBlob</span><span class="plain-syntax">(</span><span class="identifier-syntax">CHR_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">word</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replaceword</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_ReplaceBlob</span><span class="plain-syntax">(</span><span class="identifier-syntax">WORD_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">punctuated</span><span class="plain-syntax"> </span><span class="identifier-syntax">word</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replacepword</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_ReplaceBlob</span><span class="plain-syntax">(</span><span class="identifier-syntax">PWORD_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}); -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">unpunctuated</span><span class="plain-syntax"> </span><span class="identifier-syntax">word</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replaceupword</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_ReplaceBlob</span><span class="plain-syntax">(</span><span class="identifier-syntax">UWORD_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">line</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replaceline</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_ReplaceBlob</span><span class="plain-syntax">(</span><span class="identifier-syntax">LINE_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">paragraph</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replacepara</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_ReplaceBlob</span><span class="plain-syntax">(</span><span class="identifier-syntax">PARA_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}); -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">index</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">match</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_textfirstindex</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">match0_idx2</span><span class="plain-syntax"> ~= </span><span class="constant-syntax">0</span><span class="plain-syntax">) * (</span><span class="identifier-syntax">match0_idx</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">last</span><span class="plain-syntax"> </span><span class="identifier-syntax">index</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">match</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_textlastindex</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">match0_idx2</span><span class="plain-syntax"> -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">length</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">match</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_textlength</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">match0_idx2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">match0_idx</span><span class="plain-syntax">) -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP36" class="paragraph-anchor"></a><b>§36. </b>...and for regular expressions, though here we also have access to the
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exact text which matched (not interesting in the plain text case since it's
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the same as the search text, up to case at least), and the values of matched
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subexpressions (which the plain text case doesn't have).
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-RegExp</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Regular</span><span class="plain-syntax"> </span><span class="identifier-syntax">Expressions</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">exactly</span><span class="plain-syntax"> </span><span class="identifier-syntax">matches</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">regular</span><span class="plain-syntax"> </span><span class="identifier-syntax">expression</span><span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">),</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">insensitively</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_exactlymatchesre</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_Replace_RE</span><span class="plain-syntax">(</span><span class="identifier-syntax">REGEXP_BLOB</span><span class="plain-syntax">,{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">},{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">},0,{</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">},1) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">matches</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">regular</span><span class="plain-syntax"> </span><span class="identifier-syntax">expression</span><span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">),</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">insensitively</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_matchesre</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_Replace_RE</span><span class="plain-syntax">(</span><span class="identifier-syntax">REGEXP_BLOB</span><span class="plain-syntax">,{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">},{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">},0,{</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">matching</span><span class="plain-syntax"> </span><span class="identifier-syntax">regular</span><span class="plain-syntax"> </span><span class="identifier-syntax">expression</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_matchtext</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_RE_GetMatchVar</span><span class="plain-syntax">(0) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">matching</span><span class="plain-syntax"> </span><span class="identifier-syntax">subexpression</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_subexpressiontext</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_RE_GetMatchVar</span><span class="plain-syntax">({</span><span class="identifier-syntax">N</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">first</span><span class="plain-syntax"> </span><span class="identifier-syntax">index</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">subexpression</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_refirstindex</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">RE_Subexpressions</span><span class="plain-syntax">-->{</span><span class="identifier-syntax">n</span><span class="plain-syntax">}--></span><span class="identifier-syntax">RE_DATA2</span><span class="plain-syntax"> ~= </span><span class="constant-syntax">0</span><span class="plain-syntax">) * (</span><span class="identifier-syntax">RE_Subexpressions</span><span class="plain-syntax">-->{</span><span class="identifier-syntax">n</span><span class="plain-syntax">}--></span><span class="identifier-syntax">RE_DATA1</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">) -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">last</span><span class="plain-syntax"> </span><span class="identifier-syntax">index</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">subexpression</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_relastindex</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- ((</span><span class="identifier-syntax">RE_Subexpressions</span><span class="plain-syntax">-->{</span><span class="identifier-syntax">n</span><span class="plain-syntax">}--></span><span class="identifier-syntax">RE_DATA2</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) * </span><span class="identifier-syntax">RE_Subexpressions</span><span class="plain-syntax">-->{</span><span class="identifier-syntax">n</span><span class="plain-syntax">}--></span><span class="identifier-syntax">RE_DATA2</span><span class="plain-syntax">) -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">length</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">subexpression</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_relength</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">RE_Subexpressions</span><span class="plain-syntax">-->{</span><span class="identifier-syntax">n</span><span class="plain-syntax">}--></span><span class="identifier-syntax">RE_DATA2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">RE_Subexpressions</span><span class="plain-syntax">-->{</span><span class="identifier-syntax">n</span><span class="plain-syntax">}--></span><span class="identifier-syntax">RE_DATA1</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">times</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">matches</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">regular</span><span class="plain-syntax"> </span><span class="identifier-syntax">expression</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">),</span><span class="identifier-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">insensitively</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_nummatchesre</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_Replace_RE</span><span class="plain-syntax">(</span><span class="identifier-syntax">REGEXP_BLOB</span><span class="plain-syntax">,{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">},{-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">},1,{</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">replace</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">regular</span><span class="plain-syntax"> </span><span class="identifier-syntax">expression</span><span class="plain-syntax"> (</span><span class="identifier-syntax">find</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">with</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">replace</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">), </span><span class="identifier-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">insensitively</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_replacere</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_Replace_RE</span><span class="plain-syntax">(</span><span class="identifier-syntax">REGEXP_BLOB</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">find</span><span class="plain-syntax">},</span>
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<span class="plain-syntax"> {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">replace</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}); -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP37" class="paragraph-anchor"></a><b>§37. </b>Casing of text.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-TextCasing</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Casing</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Text</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">lower</span><span class="plain-syntax"> </span><span class="identifier-syntax">case</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_lowercase</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_CharactersToCase</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">upper</span><span class="plain-syntax"> </span><span class="identifier-syntax">case</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_uppercase</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_CharactersToCase</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">title</span><span class="plain-syntax"> </span><span class="identifier-syntax">case</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_titlecase</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_CharactersToCase</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="constant-syntax">2</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">sentence</span><span class="plain-syntax"> </span><span class="identifier-syntax">case</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sentencecase</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_CharactersToCase</span><span class="plain-syntax">({-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">text</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="constant-syntax">3</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">lower</span><span class="plain-syntax"> </span><span class="identifier-syntax">case</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_inlower</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_CharactersOfCase</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">upper</span><span class="plain-syntax"> </span><span class="identifier-syntax">case</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_inupper</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TEXT_TY_CharactersOfCase</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">) -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP38" class="paragraph-anchor"></a><b>§38. Adaptive text. </b></p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-AdaptiveText</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Adaptive</span><span class="plain-syntax"> </span><span class="identifier-syntax">Text</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">infinitive</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">verb</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_infinitive</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(1); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">past</span><span class="plain-syntax"> </span><span class="identifier-syntax">participle</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">verb</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_pastpart</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(2); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">present</span><span class="plain-syntax"> </span><span class="identifier-syntax">participle</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">verb</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_prespart</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(3); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">adapt</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">verb</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_adapt</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(</span><span class="identifier-syntax">CV_POS</span><span class="plain-syntax">, </span><span class="identifier-syntax">PNToVP</span><span class="plain-syntax">(), </span><span class="identifier-syntax">story_tense</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">adapt</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">verb</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">grammatical</span><span class="plain-syntax"> </span><span class="identifier-syntax">tense</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_adaptt</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(</span><span class="identifier-syntax">CV_POS</span><span class="plain-syntax">, </span><span class="identifier-syntax">PNToVP</span><span class="plain-syntax">(), {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">adapt</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">verb</span><span class="plain-syntax">) </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax"> - </span><span class="identifier-syntax">narrative</span><span class="plain-syntax"> </span><span class="identifier-syntax">viewpoint</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_adaptv</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(</span><span class="identifier-syntax">CV_POS</span><span class="plain-syntax">, {</span><span class="identifier-syntax">P</span><span class="plain-syntax">}, </span><span class="identifier-syntax">story_tense</span><span class="plain-syntax">); -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">adapt</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">verb</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">grammatical</span><span class="plain-syntax"> </span><span class="identifier-syntax">tense</span><span class="plain-syntax">) </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax"> - </span><span class="identifier-syntax">narrative</span><span class="plain-syntax"> </span><span class="identifier-syntax">viewpoint</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_adaptvt</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(</span><span class="identifier-syntax">CV_POS</span><span class="plain-syntax">, {</span><span class="identifier-syntax">P</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">negate</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">verb</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_negate</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(</span><span class="identifier-syntax">CV_NEG</span><span class="plain-syntax">, </span><span class="identifier-syntax">PNToVP</span><span class="plain-syntax">(), </span><span class="identifier-syntax">story_tense</span><span class="plain-syntax">); -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">negate</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">verb</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">grammatical</span><span class="plain-syntax"> </span><span class="identifier-syntax">tense</span><span class="plain-syntax">)</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_negatet</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(</span><span class="identifier-syntax">CV_NEG</span><span class="plain-syntax">, </span><span class="identifier-syntax">PNToVP</span><span class="plain-syntax">(), {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}); -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">negate</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">verb</span><span class="plain-syntax">) </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax"> - </span><span class="identifier-syntax">narrative</span><span class="plain-syntax"> </span><span class="identifier-syntax">viewpoint</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_negatev</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(</span><span class="identifier-syntax">CV_NEG</span><span class="plain-syntax">, {</span><span class="identifier-syntax">P</span><span class="plain-syntax">}, </span><span class="identifier-syntax">story_tense</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">negate</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">verb</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">grammatical</span><span class="plain-syntax"> </span><span class="identifier-syntax">tense</span><span class="plain-syntax">) </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax"> - </span><span class="identifier-syntax">narrative</span><span class="plain-syntax"> </span><span class="identifier-syntax">viewpoint</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_negatevt</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(</span><span class="identifier-syntax">CV_NEG</span><span class="plain-syntax">, {</span><span class="identifier-syntax">P</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">objects</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">meaning</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">verb</span><span class="plain-syntax">): (- {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}(</span><span class="identifier-syntax">CV_MEANING</span><span class="plain-syntax">) -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP39" class="paragraph-anchor"></a><b>§39. Data Structures. </b>Inform provides three main data structures: tables, lists, and relations,
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which we will take in that order.
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</p>
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<p class="commentary">Tables mimic tables of data as seen in books or scientific papers. Note that
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changing a table entry is not something defined here as a phrase: the
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ever-powerful "now" can do that. But changing something to a non-value —
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or "blanking" it — requires specialist phrases.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Tables</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Data</span><span class="plain-syntax"> </span><span class="identifier-syntax">Structures</span>
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Tables</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">choose</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax">/</span><span class="identifier-syntax">the</span><span class="plain-syntax">/-- </span><span class="identifier-syntax">row</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_chooserow</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">} = {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}; {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">} = {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}; -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">choose</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax">/</span><span class="identifier-syntax">the</span><span class="plain-syntax">/-- </span><span class="identifier-syntax">row</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TC</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">valued</span><span class="plain-syntax"> </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">column</span><span class="plain-syntax">) </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">w</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_chooserowwith</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">} = {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}; {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">} = </span><span class="identifier-syntax">TableRowCorr</span><span class="plain-syntax">(</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">, {</span><span class="identifier-syntax">TC</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">w</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">choose</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax">/</span><span class="identifier-syntax">the</span><span class="plain-syntax">/-- </span><span class="identifier-syntax">blank</span><span class="plain-syntax"> </span><span class="identifier-syntax">row</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_chooseblankrow</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">} = {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}; {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">} = </span><span class="identifier-syntax">TableBlankRow</span><span class="plain-syntax">(</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">choose</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax">/</span><span class="identifier-syntax">the</span><span class="plain-syntax">/-- </span><span class="identifier-syntax">random</span><span class="plain-syntax"> </span><span class="identifier-syntax">row</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_chooserandomrow</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">} = {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}; {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">} = </span><span class="identifier-syntax">TableRandomRow</span><span class="plain-syntax">(</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">rows</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numrows</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableRows</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">blank</span><span class="plain-syntax"> </span><span class="identifier-syntax">rows</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numblank</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableBlankRows</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">filled</span><span class="plain-syntax"> </span><span class="identifier-syntax">rows</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numfilled</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableFilledRows</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">there</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TR</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_thereis</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">-</span><span class="identifier-syntax">exists</span><span class="plain-syntax">:</span><span class="identifier-syntax">TR</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">there</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">no</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TR</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_thereisno</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- ({-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">-</span><span class="identifier-syntax">exists</span><span class="plain-syntax">:</span><span class="identifier-syntax">TR</span><span class="plain-syntax">} == </span><span class="identifier-syntax">false</span><span class="plain-syntax">) -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">blank</span><span class="plain-syntax"> </span><span class="identifier-syntax">out</span><span class="plain-syntax"> (</span><span class="identifier-syntax">tr</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_blankout</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">-</span><span class="identifier-syntax">blank</span><span class="plain-syntax">-</span><span class="identifier-syntax">out</span><span class="plain-syntax">:</span><span class="identifier-syntax">tr</span><span class="plain-syntax">}; -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">blank</span><span class="plain-syntax"> </span><span class="identifier-syntax">out</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">whole</span><span class="plain-syntax"> </span><span class="identifier-syntax">row</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_blankoutrow</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableBlankOutRow</span><span class="plain-syntax">({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">blank</span><span class="plain-syntax"> </span><span class="identifier-syntax">out</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">whole</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TC</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">column</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax">/</span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_blankoutcol</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableBlankOutColumn</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">TC</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">blank</span><span class="plain-syntax"> </span><span class="identifier-syntax">out</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">whole</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_blankouttable</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableBlankOutAll</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}); -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP40" class="paragraph-anchor"></a><b>§40. </b>These four are for debugging purposes only, and are used in the same test
|
|
case. "Showme the contents of ..." is not a text substitution, for efficiency
|
|
reasons: for a large table it could produce a gargantuan output, and in a
|
|
story file with memory constraints, one might not want to store that in a
|
|
text variable.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">showme</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">contents</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_showmetable</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableDebug</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax">/-- </span><span class="identifier-syntax">current</span><span class="plain-syntax"> </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">row</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_currenttablerow</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableRowDebug</span><span class="plain-syntax">({-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_0</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">my</span><span class="plain-syntax">:</span><span class="identifier-syntax">ct_1</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">row</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_tablerow</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableRowDebug</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TC</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">column</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">phs_tablecolumn</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableColumnDebug</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">TC</span><span class="plain-syntax">}); -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP41" class="paragraph-anchor"></a><b>§41. </b>Sorting.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-TableSort</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Sorting</span><span class="plain-syntax"> </span><span class="identifier-syntax">Tables</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">sort</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">into</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> </span><span class="identifier-syntax">order</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sortrandom</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableShuffle</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">sort</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">into</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TC</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">column</span><span class="plain-syntax">) </span><span class="identifier-syntax">order</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sortcolumn</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableSort</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">TC</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">sort</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">into</span><span class="plain-syntax"> </span><span class="identifier-syntax">reverse</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TC</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">column</span><span class="plain-syntax">) </span><span class="identifier-syntax">order</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sortcolumnreverse</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">TableSort</span><span class="plain-syntax">({</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">TC</span><span class="plain-syntax">}, -1); -).</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP42" class="paragraph-anchor"></a><b>§42. Lists. </b>The following are all for adding and removing values to dynamic lists.
|
|
</p>
|
|
|
|
<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Lists</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Lists</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">add</span><span class="plain-syntax"> (</span><span class="identifier-syntax">new</span><span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">), </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">absent</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_addtolist</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_InsertItem</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">new</span><span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, {</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}); -).</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">add</span><span class="plain-syntax"> (</span><span class="identifier-syntax">new</span><span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax"> (</span><span class="identifier-syntax">E</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">), </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">absent</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_addatentry</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_InsertItem</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">new</span><span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">, {</span><span class="identifier-syntax">E</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}); -).</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">add</span><span class="plain-syntax"> (</span><span class="identifier-syntax">LX</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">), </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">absent</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_addlisttolist</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_AppendList</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">LX</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, {</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}); -).</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">add</span><span class="plain-syntax"> (</span><span class="identifier-syntax">LX</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax">) </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax"> (</span><span class="identifier-syntax">E</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_addlistatentry</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_AppendList</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">LX</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">, {</span><span class="identifier-syntax">E</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">); -).</span>
|
|
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">remove</span><span class="plain-syntax"> (</span><span class="identifier-syntax">existing</span><span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">), </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">present</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_remfromlist</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_RemoveValue</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">existing</span><span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">remove</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">), </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">present</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_remlistfromlist</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Remove_List</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}); -).</span>
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|
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">remove</span><span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">), </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">present</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rementry</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_RemoveItemRange</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}); -).</span>
|
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">remove</span><span class="plain-syntax"> </span><span class="identifier-syntax">entries</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">), </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">present</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rementries</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_RemoveItemRange</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N2</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">options</span><span class="plain-syntax">}); -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP43" class="paragraph-anchor"></a><b>§43. </b>Searching a list is implemented in a somewhat crude way at present, and the
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following syntax may later be replaced with a suitable verb "to be listed
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in", so that there's no need to imitate.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">listed</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_islistedin</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">LIST_OF_TY_FindItem</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">})) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">not</span><span class="plain-syntax"> </span><span class="identifier-syntax">listed</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_isnotlistedin</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">LIST_OF_TY_FindItem</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}) == </span><span class="identifier-syntax">false</span><span class="plain-syntax">) -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP44" class="paragraph-anchor"></a><b>§44. </b>A description is a representation of a set of objects by means of a
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predicate (e.g., "open unlocked doors"), and it converts into a list of
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current members (in creation order), but there's no reverse process.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax"> - </span><span class="identifier-syntax">description</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_listofdesc</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">new</span><span class="plain-syntax">-</span><span class="identifier-syntax">list</span><span class="plain-syntax">-</span><span class="identifier-syntax">of</span><span class="plain-syntax">:</span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">} -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP45" class="paragraph-anchor"></a><b>§45. </b>Determining and setting the length:
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-ListLength</span></span>.
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</p>
|
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Length</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">lists</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">entries</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">of</span><span class="plain-syntax">/</span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numberentries</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_GetLength</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">truncate</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">entries</span><span class="plain-syntax">/</span><span class="identifier-syntax">entry</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_truncate</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_SetLength</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, -1, </span><span class="constant-syntax">1</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">truncate</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">first</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">entries</span><span class="plain-syntax">/</span><span class="identifier-syntax">entry</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_truncatefirst</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_SetLength</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, -1, </span><span class="constant-syntax">1</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">truncate</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">last</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">entries</span><span class="plain-syntax">/</span><span class="identifier-syntax">entry</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_truncatelast</span><span class="plain-syntax">):</span>
|
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_SetLength</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, -1, -1); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">extend</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">entries</span><span class="plain-syntax">/</span><span class="identifier-syntax">entry</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_extend</span><span class="plain-syntax">):</span>
|
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_SetLength</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">); -).</span>
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">change</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">have</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax">) </span><span class="identifier-syntax">entries</span><span class="plain-syntax">/</span><span class="identifier-syntax">entry</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_changelength</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_SetLength</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">N</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">); -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP46" class="paragraph-anchor"></a><b>§46. </b>Easy but useful list operations. Sorting ultimately uses a common sorting
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mechanism, in "Sort.i6t", which handles both lists and tables.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-ListOperations</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax"> - </span><span class="identifier-syntax">List</span><span class="plain-syntax"> </span><span class="identifier-syntax">operations</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">reverse</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_reverselist</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Reverse</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">rotate</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rotatelist</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Rotate</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">rotate</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">backwards</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rotatelistback</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Rotate</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">sort</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sortlist</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Sort</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">sort</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">into</span><span class="plain-syntax"> </span><span class="identifier-syntax">reverse</span><span class="plain-syntax"> </span><span class="identifier-syntax">order</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sortlistreverse</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Sort</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, -1); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">sort</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">into</span><span class="plain-syntax"> </span><span class="identifier-syntax">random</span><span class="plain-syntax"> </span><span class="identifier-syntax">order</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sortlistrandom</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Sort</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="constant-syntax">2</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">sort</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">objects</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">into</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax"> - </span><span class="identifier-syntax">property</span><span class="plain-syntax">) </span><span class="identifier-syntax">order</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sortlistproperty</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Sort</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="constant-syntax">1</span><span class="plain-syntax">, {</span><span class="identifier-syntax">P</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">property</span><span class="plain-syntax">-</span><span class="identifier-syntax">holds</span><span class="plain-syntax">-</span><span class="identifier-syntax">block</span><span class="plain-syntax">-</span><span class="identifier-syntax">value</span><span class="plain-syntax">:</span><span class="identifier-syntax">P</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">sort</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">objects</span><span class="plain-syntax">) </span><span class="identifier-syntax">in</span><span class="plain-syntax">/</span><span class="identifier-syntax">into</span><span class="plain-syntax"> </span><span class="identifier-syntax">reverse</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax"> - </span><span class="identifier-syntax">property</span><span class="plain-syntax">) </span><span class="identifier-syntax">order</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_sortlistpropertyreverse</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">LIST_OF_TY_Sort</span><span class="plain-syntax">({-</span><span class="identifier-syntax">lvalue</span><span class="plain-syntax">-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}, -1, {</span><span class="identifier-syntax">P</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">property</span><span class="plain-syntax">-</span><span class="identifier-syntax">holds</span><span class="plain-syntax">-</span><span class="identifier-syntax">block</span><span class="plain-syntax">-</span><span class="identifier-syntax">value</span><span class="plain-syntax">:</span><span class="identifier-syntax">P</span><span class="plain-syntax">}); -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP47" class="paragraph-anchor"></a><b>§47. </b>Relations are the final data structure given here. In some ways they are
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the most fundamental of all, but they're not either set or tested by
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procedural phrases — they lie in the linguistic structure of conditions.
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So all we have here are the route-finding phrases:
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Relations</span></span>.
|
|
</p>
|
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Relations</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">show</span><span class="plain-syntax"> </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_showrelation</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">show</span><span class="plain-syntax">-</span><span class="identifier-syntax">me</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}; </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_SHOW</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">object</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">next</span><span class="plain-syntax"> </span><span class="identifier-syntax">step</span><span class="plain-syntax"> </span><span class="identifier-syntax">via</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">objects</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">O1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">O2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_nextstep</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationRouteTo</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">},{</span><span class="identifier-syntax">O1</span><span class="plain-syntax">},{</span><span class="identifier-syntax">O2</span><span class="plain-syntax">},</span><span class="identifier-syntax">false</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">steps</span><span class="plain-syntax"> </span><span class="identifier-syntax">via</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">objects</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">O1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">O2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">object</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_numbersteps</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationRouteTo</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">},{</span><span class="identifier-syntax">O1</span><span class="plain-syntax">},{</span><span class="identifier-syntax">O2</span><span class="plain-syntax">},</span><span class="identifier-syntax">true</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">that</span><span class="plain-syntax">/</span><span class="identifier-syntax">which</span><span class="plain-syntax">/</span><span class="identifier-syntax">whom</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">relates</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_leftdomain</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LIST</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RLIST_ALL_X</span><span class="plain-syntax">) -).</span>
|
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax">/</span><span class="identifier-syntax">whom</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax">) </span><span class="identifier-syntax">relates</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rightdomain</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LIST</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RLIST_ALL_Y</span><span class="plain-syntax">) -). </span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">that</span><span class="plain-syntax">/</span><span class="identifier-syntax">which</span><span class="plain-syntax">/</span><span class="identifier-syntax">whom</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax">) </span><span class="identifier-syntax">relates</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rightdomain</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LIST</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RLIST_ALL_Y</span><span class="plain-syntax">) -). </span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">that</span><span class="plain-syntax">/</span><span class="identifier-syntax">which</span><span class="plain-syntax">/</span><span class="identifier-syntax">who</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">relate</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_leftlookuplist</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LOOKUP_ALL_X</span><span class="plain-syntax">, {</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax">/</span><span class="identifier-syntax">whom</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">relates</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rightlookuplist</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LOOKUP_ALL_Y</span><span class="plain-syntax">, {</span><span class="identifier-syntax">X</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">}) -). </span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">that</span><span class="plain-syntax">/</span><span class="identifier-syntax">which</span><span class="plain-syntax">/</span><span class="identifier-syntax">whom</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">relates</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rightlookuplist</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LOOKUP_ALL_Y</span><span class="plain-syntax">, {</span><span class="identifier-syntax">X</span><span class="plain-syntax">}, {-</span><span class="identifier-syntax">new</span><span class="plain-syntax">:</span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">}) -). </span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">whether</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">relates</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">by</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_ifright</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LOOKUP_ANY</span><span class="plain-syntax">, {</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RLANY_CAN_GET_X</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">whether</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">relates</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">by</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_ifleft</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LOOKUP_ANY</span><span class="plain-syntax">, {</span><span class="identifier-syntax">X</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RLANY_CAN_GET_Y</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">that</span><span class="plain-syntax">/</span><span class="identifier-syntax">which</span><span class="plain-syntax">/</span><span class="identifier-syntax">who</span><span class="plain-syntax"> </span><span class="identifier-syntax">relates</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">Y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_leftlookup</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LOOKUP_ANY</span><span class="plain-syntax">, {</span><span class="identifier-syntax">Y</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RLANY_GET_X</span><span class="plain-syntax">) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax">/</span><span class="identifier-syntax">whom</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">relates</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rightlookup</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LOOKUP_ANY</span><span class="plain-syntax">, {</span><span class="identifier-syntax">X</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RLANY_GET_Y</span><span class="plain-syntax">) -). </span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">that</span><span class="plain-syntax">/</span><span class="identifier-syntax">which</span><span class="plain-syntax">/</span><span class="identifier-syntax">whom</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">relates</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> - </span><span class="identifier-syntax">relation</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rightlookup</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RelationTest</span><span class="plain-syntax">({-</span><span class="identifier-syntax">by</span><span class="plain-syntax">-</span><span class="identifier-syntax">reference</span><span class="plain-syntax">:</span><span class="identifier-syntax">R</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RELS_LOOKUP_ANY</span><span class="plain-syntax">, {</span><span class="identifier-syntax">X</span><span class="plain-syntax">}, </span><span class="identifier-syntax">RLANY_GET_Y</span><span class="plain-syntax">) -). </span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP48" class="paragraph-anchor"></a><b>§48. Functional Programming. </b>Here we have the ability to use the name of a function as a value, and to
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apply such a function.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Apply</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Functional</span><span class="plain-syntax"> </span><span class="identifier-syntax">Programming</span>
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Applying</span><span class="plain-syntax"> </span><span class="identifier-syntax">Functions</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">whether</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">matches</span><span class="plain-syntax"> (</span><span class="identifier-syntax">desc</span><span class="plain-syntax"> - </span><span class="identifier-syntax">description</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_valuematch</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">description</span><span class="plain-syntax">-</span><span class="identifier-syntax">application</span><span class="plain-syntax">} -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax"> -> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">applied</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_applied0</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">function</span><span class="plain-syntax">-</span><span class="identifier-syntax">application</span><span class="plain-syntax">} -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> -> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">applied</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_applied1</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">function</span><span class="plain-syntax">-</span><span class="identifier-syntax">application</span><span class="plain-syntax">} -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">M</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> (</span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) -> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">M</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">applied</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">and</span><span class="plain-syntax"> (</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_applied2</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">function</span><span class="plain-syntax">-</span><span class="identifier-syntax">application</span><span class="plain-syntax">} -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> (</span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">, </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">M</span><span class="plain-syntax">) -> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">applied</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">and</span><span class="plain-syntax"> (</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">and</span><span class="plain-syntax"> (</span><span class="identifier-syntax">third</span><span class="plain-syntax"> </span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">M</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_applied3</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">function</span><span class="plain-syntax">-</span><span class="identifier-syntax">application</span><span class="plain-syntax">} -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">apply</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax"> -> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_apply0</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">function</span><span class="plain-syntax">-</span><span class="identifier-syntax">application</span><span class="plain-syntax">}; -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">apply</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> -> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_apply1</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">function</span><span class="plain-syntax">-</span><span class="identifier-syntax">application</span><span class="plain-syntax">}; -).</span>
|
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">apply</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> (</span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) -> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">and</span><span class="plain-syntax"> (</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">L</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_apply2</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">function</span><span class="plain-syntax">-</span><span class="identifier-syntax">application</span><span class="plain-syntax">}; -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">apply</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> (</span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">, </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">M</span><span class="plain-syntax">) -> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">and</span><span class="plain-syntax"> (</span><span class="identifier-syntax">second</span><span class="plain-syntax"> </span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">and</span><span class="plain-syntax"> (</span><span class="identifier-syntax">third</span><span class="plain-syntax"> </span><span class="identifier-syntax">input</span><span class="plain-syntax"> - </span><span class="identifier-syntax">M</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_apply3</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- {-</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-</span><span class="identifier-syntax">definition</span><span class="plain-syntax">:</span><span class="identifier-syntax">function</span><span class="plain-syntax">-</span><span class="identifier-syntax">application</span><span class="plain-syntax">}; -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP49" class="paragraph-anchor"></a><b>§49. </b>The standard map, reduce and filter operations found in most functional
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programming languages also have Inform analogues.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Map</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Working</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">Lists</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> -> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">applied</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">original</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_appliedlist</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">result</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ls</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax"> </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">original</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax">:</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">mapped</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">applied</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">add</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">mapped</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">result</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">result</span><span class="plain-syntax">.</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">function</span><span class="plain-syntax"> - </span><span class="identifier-syntax">phrase</span><span class="plain-syntax"> (</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">) -> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">reduction</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">original</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_reduction</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">total</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">count</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax"> </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">original</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax">:</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">increase</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">count</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">count</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">now</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">total</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">otherwise</span><span class="plain-syntax"> </span><span class="identifier-syntax">now</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">total</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">function</span><span class="plain-syntax"> </span><span class="identifier-syntax">applied</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">total</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">total</span><span class="plain-syntax">.</span>
|
|
|
|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">filter</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">criterion</span><span class="plain-syntax"> - </span><span class="identifier-syntax">description</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Ks</span><span class="plain-syntax">) </span><span class="identifier-syntax">of</span>
|
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<span class="plain-syntax"> (</span><span class="identifier-syntax">full</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> - </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">values</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_filter</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">filtered</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">repeat</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax"> </span><span class="identifier-syntax">running</span><span class="plain-syntax"> </span><span class="identifier-syntax">through</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">full</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax">:</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax"> </span><span class="identifier-syntax">matches</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">criterion</span><span class="plain-syntax">:</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">add</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">item</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">filtered</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">filtered</span><span class="plain-syntax"> </span><span class="identifier-syntax">list</span><span class="plain-syntax">.</span>
|
|
</pre>
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<p class="commentary firstcommentary"><a id="SP50" class="paragraph-anchor"></a><b>§50. Rulebooks and Activities. </b></p>
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<p class="commentary">Firing off activities:
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Activities</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">8</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Rulebooks</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Activities</span>
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Carrying</span><span class="plain-syntax"> </span><span class="identifier-syntax">out</span><span class="plain-syntax"> </span><span class="identifier-syntax">Activities</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">carry</span><span class="plain-syntax"> </span><span class="identifier-syntax">out</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_carryout</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">CarryOutActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">carry</span><span class="plain-syntax"> </span><span class="identifier-syntax">out</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_carryoutwith</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">CarryOutActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">val</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">continue</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">activity</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_continueactivity</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">rfalse</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP51" class="paragraph-anchor"></a><b>§51. </b>Advanced activity phrases: for setting up one's own activities structured
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around I7 source text. People tend not to use this much, and perhaps that's
|
|
a good thing, but it does open up possibilities, and it's good for
|
|
retro-fitting onto extensions to make them more customisable.
|
|
</p>
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|
<p class="commentary">These are really only useful in an activity-rich environment, in any case.
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See the documentation example <span class="extract"><span class="extract-syntax">AntSensitiveSunglasses</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Advanced</span><span class="plain-syntax"> </span><span class="identifier-syntax">Activities</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_beginactivity</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">BeginActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">begin</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_beginactivitywith</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">BeginActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">val</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">whether</span><span class="plain-syntax"> </span><span class="identifier-syntax">handling</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_handlingactivity</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (~~(</span><span class="identifier-syntax">ForActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}))) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">whether</span><span class="plain-syntax"> </span><span class="identifier-syntax">handling</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_handlingactivitywith</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- (~~(</span><span class="identifier-syntax">ForActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">val</span><span class="plain-syntax">}))) -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_endactivity</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">EndActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}); -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">end</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_endactivitywith</span><span class="plain-syntax">):</span>
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|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">EndActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">val</span><span class="plain-syntax">}); -).</span>
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|
<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">abandon</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_abandonactivity</span><span class="plain-syntax">):</span>
|
|
<span class="plain-syntax"> (- </span><span class="identifier-syntax">AbandonActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">abandon</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> - </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">on</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">activity</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_abandonactivitywith</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">AbandonActivity</span><span class="plain-syntax">({</span><span class="identifier-syntax">A</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">val</span><span class="plain-syntax">}); -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP52" class="paragraph-anchor"></a><b>§52. </b>Here are four different ways to invoke a rule or rulebook:
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Rules</span></span>.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Following</span><span class="plain-syntax"> </span><span class="identifier-syntax">Rules</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">follow</span><span class="plain-syntax"> (</span><span class="identifier-syntax">RL</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_follow</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FollowRulebook</span><span class="plain-syntax">({</span><span class="identifier-syntax">RL</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">follow</span><span class="plain-syntax"> (</span><span class="identifier-syntax">RL</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">based</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> </span><span class="identifier-syntax">producing</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) </span><span class="identifier-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_followfor</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FollowRulebook</span><span class="plain-syntax">({</span><span class="identifier-syntax">RL</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}, </span><span class="identifier-syntax">true</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">follow</span><span class="plain-syntax"> (</span><span class="identifier-syntax">RL</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax"> </span><span class="identifier-syntax">based</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_follow</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FollowRulebook</span><span class="plain-syntax">({</span><span class="identifier-syntax">RL</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">produced</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">RL</span><span class="plain-syntax"> - </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> </span><span class="identifier-syntax">producing</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_producedby</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">ResultOfRule</span><span class="plain-syntax">({</span><span class="identifier-syntax">RL</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">true</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">strong</span><span class="plain-syntax">-</span><span class="identifier-syntax">kind</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">produced</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">RL</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">based</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">producing</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">) </span><span class="identifier-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_producedbyfor</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">ResultOfRule</span><span class="plain-syntax">({</span><span class="identifier-syntax">RL</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}, </span><span class="identifier-syntax">true</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">strong</span><span class="plain-syntax">-</span><span class="identifier-syntax">kind</span><span class="plain-syntax">:</span><span class="identifier-syntax">L</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> (</span><span class="identifier-syntax">name</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">) </span><span class="identifier-syntax">produced</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">RL</span><span class="plain-syntax"> - </span><span class="identifier-syntax">nothing</span><span class="plain-syntax"> </span><span class="identifier-syntax">based</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> </span><span class="identifier-syntax">producing</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_producedby</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">ResultOfRule</span><span class="plain-syntax">({</span><span class="identifier-syntax">RL</span><span class="plain-syntax">}, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">true</span><span class="plain-syntax">, {-</span><span class="identifier-syntax">strong</span><span class="plain-syntax">-</span><span class="identifier-syntax">kind</span><span class="plain-syntax">:</span><span class="identifier-syntax">K</span><span class="plain-syntax">}) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">abide</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">RL</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_abide</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FollowRulebook</span><span class="plain-syntax">({</span><span class="identifier-syntax">RL</span><span class="plain-syntax">})) </span><span class="identifier-syntax">rtrue</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">abide</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">RL</span><span class="plain-syntax"> - </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> </span><span class="identifier-syntax">based</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> </span><span class="identifier-syntax">producing</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">) </span><span class="identifier-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">V</span><span class="plain-syntax"> - </span><span class="identifier-syntax">K</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_abidefor</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FollowRulebook</span><span class="plain-syntax">({</span><span class="identifier-syntax">RL</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">V</span><span class="plain-syntax">}, </span><span class="identifier-syntax">true</span><span class="plain-syntax">)) </span><span class="identifier-syntax">rtrue</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">abide</span><span class="plain-syntax"> </span><span class="identifier-syntax">by</span><span class="plain-syntax"> (</span><span class="identifier-syntax">RL</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">nothing</span><span class="plain-syntax"> </span><span class="identifier-syntax">based</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_abide</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FollowRulebook</span><span class="plain-syntax">({</span><span class="identifier-syntax">RL</span><span class="plain-syntax">})) </span><span class="identifier-syntax">rtrue</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP53" class="paragraph-anchor"></a><b>§53. </b>Rules return <span class="extract"><span class="extract-syntax">true</span></span> to indicate a decision, which could be either a success
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or a failure, and optionally may also return a value. If they return <span class="extract"><span class="extract-syntax">false</span></span>,
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there's no decision.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Rules</span></span> once again.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Success</span><span class="plain-syntax"> </span><span class="identifier-syntax">and</span><span class="plain-syntax"> </span><span class="identifier-syntax">Failure</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">make</span><span class="plain-syntax"> </span><span class="identifier-syntax">no</span><span class="plain-syntax"> </span><span class="identifier-syntax">decision</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_nodecision</span><span class="plain-syntax">): (- </span><span class="identifier-syntax">rfalse</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> </span><span class="identifier-syntax">succeeds</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_succeeds</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RulebookSucceeds</span><span class="plain-syntax">(); </span><span class="identifier-syntax">rtrue</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> </span><span class="identifier-syntax">fails</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_fails</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RulebookFails</span><span class="plain-syntax">(); </span><span class="identifier-syntax">rtrue</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> </span><span class="identifier-syntax">succeeds</span><span class="plain-syntax"> </span><span class="identifier-syntax">with</span><span class="plain-syntax"> </span><span class="identifier-syntax">result</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_succeedswith</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">RulebookSucceeds</span><span class="plain-syntax">({-</span><span class="identifier-syntax">strong</span><span class="plain-syntax">-</span><span class="identifier-syntax">kind</span><span class="plain-syntax">:</span><span class="identifier-syntax">rule</span><span class="plain-syntax">-</span><span class="identifier-syntax">return</span><span class="plain-syntax">-</span><span class="identifier-syntax">kind</span><span class="plain-syntax">},{-</span><span class="identifier-syntax">return</span><span class="plain-syntax">-</span><span class="identifier-syntax">value</span><span class="plain-syntax">-</span><span class="identifier-syntax">from</span><span class="plain-syntax">-</span><span class="identifier-syntax">rule</span><span class="plain-syntax">:</span><span class="identifier-syntax">val</span><span class="plain-syntax">}); </span><span class="identifier-syntax">rtrue</span><span class="plain-syntax">; -) - </span><span class="identifier-syntax">in</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">only</span><span class="plain-syntax">.</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> </span><span class="identifier-syntax">succeeded</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_succeeded</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">RulebookSucceeded</span><span class="plain-syntax">()) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> </span><span class="identifier-syntax">failed</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_failed</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">RulebookFailed</span><span class="plain-syntax">()) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">which</span><span class="plain-syntax"> </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> </span><span class="identifier-syntax">outcome</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">outcome</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">rulebook</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_rulebookoutcome</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">ResultOfRule</span><span class="plain-syntax">()) -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP54" class="paragraph-anchor"></a><b>§54. External Files. </b>Inform has a quirky level of support for file-handling, which comes out what
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the Glulx virtual machine will support.
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</p>
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<p class="commentary">See test case <span class="extract"><span class="extract-syntax">BIP-Files-G</span></span>, which has no Z-machine counterpart.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">9</span><span class="plain-syntax"> - </span><span class="identifier-syntax">External</span><span class="plain-syntax"> </span><span class="identifier-syntax">Files</span><span class="plain-syntax"> (</span><span class="identifier-syntax">not</span><span class="plain-syntax"> </span><span class="identifier-syntax">for</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z</span><span class="plain-syntax">-</span><span class="identifier-syntax">machine</span><span class="plain-syntax">)</span>
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Files</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Text</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">write</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FN</span><span class="plain-syntax"> - </span><span class="identifier-syntax">external</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_writetext</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FileIO_PutContents</span><span class="plain-syntax">({</span><span class="identifier-syntax">FN</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="identifier-syntax">false</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">append</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">text</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FN</span><span class="plain-syntax"> - </span><span class="identifier-syntax">external</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_appendtext</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FileIO_PutContents</span><span class="plain-syntax">({</span><span class="identifier-syntax">FN</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}, </span><span class="identifier-syntax">true</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">say</span><span class="plain-syntax"> </span><span class="identifier-syntax">text</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FN</span><span class="plain-syntax"> - </span><span class="identifier-syntax">external</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_saytext</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FileIO_PrintContents</span><span class="plain-syntax">({</span><span class="identifier-syntax">FN</span><span class="plain-syntax">}); </span><span class="identifier-syntax">say__p</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP55" class="paragraph-anchor"></a><b>§55. </b>See test case <span class="extract"><span class="extract-syntax">BIP-FilesOfTables-G</span></span>, which has no Z-machine counterpart.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Files</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> </span><span class="identifier-syntax">Data</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">read</span><span class="plain-syntax"> (</span><span class="identifier-syntax">filename</span><span class="plain-syntax"> - </span><span class="identifier-syntax">external</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">) </span><span class="identifier-syntax">into</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_readtable</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FileIO_GetTable</span><span class="plain-syntax">({</span><span class="identifier-syntax">filename</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">write</span><span class="plain-syntax"> (</span><span class="identifier-syntax">filename</span><span class="plain-syntax"> - </span><span class="identifier-syntax">external</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">) </span><span class="identifier-syntax">from</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> - </span><span class="identifier-syntax">table</span><span class="plain-syntax"> </span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_writetable</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FileIO_PutTable</span><span class="plain-syntax">({</span><span class="identifier-syntax">filename</span><span class="plain-syntax">}, {</span><span class="identifier-syntax">T</span><span class="plain-syntax">}); -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP56" class="paragraph-anchor"></a><b>§56. </b>These are hardly used phrases which are difficult to test convincingly
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in our framework, since they defend against independent Inform programs
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simultaneously trying to access the same file.
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</p>
|
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> - </span><span class="identifier-syntax">File</span><span class="plain-syntax"> </span><span class="identifier-syntax">Handling</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">filename</span><span class="plain-syntax"> - </span><span class="identifier-syntax">external</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">) </span><span class="identifier-syntax">exists</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_fileexists</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">FileIO_Exists</span><span class="plain-syntax">({</span><span class="identifier-syntax">filename</span><span class="plain-syntax">}, </span><span class="identifier-syntax">false</span><span class="plain-syntax">)) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">if</span><span class="plain-syntax"> </span><span class="identifier-syntax">ready</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">read</span><span class="plain-syntax"> (</span><span class="identifier-syntax">filename</span><span class="plain-syntax"> - </span><span class="identifier-syntax">external</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_fileready</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- (</span><span class="identifier-syntax">FileIO_Ready</span><span class="plain-syntax">({</span><span class="identifier-syntax">filename</span><span class="plain-syntax">}, </span><span class="identifier-syntax">false</span><span class="plain-syntax">)) -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">mark</span><span class="plain-syntax"> (</span><span class="identifier-syntax">filename</span><span class="plain-syntax"> - </span><span class="identifier-syntax">external</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">) </span><span class="identifier-syntax">as</span><span class="plain-syntax"> </span><span class="identifier-syntax">ready</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">read</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_markfileready</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FileIO_MarkReady</span><span class="plain-syntax">({</span><span class="identifier-syntax">filename</span><span class="plain-syntax">}, </span><span class="identifier-syntax">true</span><span class="plain-syntax">); -).</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">mark</span><span class="plain-syntax"> (</span><span class="identifier-syntax">filename</span><span class="plain-syntax"> - </span><span class="identifier-syntax">external</span><span class="plain-syntax"> </span><span class="identifier-syntax">file</span><span class="plain-syntax">) </span><span class="identifier-syntax">as</span><span class="plain-syntax"> </span><span class="identifier-syntax">not</span><span class="plain-syntax"> </span><span class="identifier-syntax">ready</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> </span><span class="identifier-syntax">read</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">documented</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> </span><span class="identifier-syntax">ph_markfilenotready</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">FileIO_MarkReady</span><span class="plain-syntax">({</span><span class="identifier-syntax">filename</span><span class="plain-syntax">}, </span><span class="identifier-syntax">false</span><span class="plain-syntax">); -).</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP57" class="paragraph-anchor"></a><b>§57. Use Options. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">Chapter</span><span class="plain-syntax"> </span><span class="constant-syntax">10</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Use</span><span class="plain-syntax"> </span><span class="identifier-syntax">Options</span>
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<span class="identifier-syntax">Section</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Numerical</span><span class="plain-syntax"> </span><span class="identifier-syntax">Value</span>
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<span class="identifier-syntax">To</span><span class="plain-syntax"> </span><span class="identifier-syntax">decide</span><span class="plain-syntax"> </span><span class="identifier-syntax">what</span><span class="plain-syntax"> </span><span class="identifier-syntax">number</span><span class="plain-syntax"> </span><span class="identifier-syntax">is</span><span class="plain-syntax"> </span><span class="identifier-syntax">the</span><span class="plain-syntax"> </span><span class="identifier-syntax">numerical</span><span class="plain-syntax"> </span><span class="identifier-syntax">value</span><span class="plain-syntax"> </span><span class="identifier-syntax">of</span><span class="plain-syntax"> (</span><span class="identifier-syntax">U</span><span class="plain-syntax"> - </span><span class="identifier-syntax">a</span><span class="plain-syntax"> </span><span class="identifier-syntax">use</span><span class="plain-syntax"> </span><span class="identifier-syntax">option</span><span class="plain-syntax">):</span>
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<span class="plain-syntax"> (- </span><span class="identifier-syntax">USE_OPTION_VALUES</span><span class="plain-syntax">-->({</span><span class="identifier-syntax">U</span><span class="plain-syntax">}) -).</span>
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</pre>
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