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<!--Weave of '22/ptd' generated by 7-->
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<ul class="crumbs"><li><a href="../webs.html">★</a></li><li><a href="index.html">core</a></li><li><a href="index.html#22">Chapter 22: Phrases</a></li><li><b>Phrase Type Data</b></li></ul><p class="purpose">To create, manage, compare the logical specificity of, and assist excerpt parsing concerning, the type of a To phrase. This involves whether it is void, determines a condition or returns a value (and if so, what kind of value); and also what parameters it takes (possibly values, possible other types used by inline definitions) and their types in turn.</p>
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<ul class="toc"><li><a href="#SP1">§1. Definitions</a></li><li><a href="#SP10">§10. Creation</a></li><li><a href="#SP13">§13. The kind of a phrase</a></li><li><a href="#SP16">§16. The tokens</a></li><li><a href="#SP19">§19. Deprecation</a></li><li><a href="#SP20">§20. Adding token names to a stack frame</a></li><li><a href="#SP21">§21. Comparison of PHTDs</a></li><li><a href="#SP22">§22. Say phrases</a></li><li><a href="#SP23">§23. Inline phrases</a></li><li><a href="#SP28">§28. Return value polymorphism</a></li><li><a href="#SP29">§29. Tweaking phrase ordering</a></li></ul><hr class="tocbar">
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<p class="inwebparagraph"><a id="SP1"></a><b>§1. Definitions. </b></p>
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<p class="inwebparagraph"><a id="SP2"></a><b>§2. </b>Inform is an unusual language in that it does not distinguish between
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functions, control structures and keywords: they are all phrases. This
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means that the functional description of what a phrase does has to be more
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than just a kind like <code class="display"><span class="extract">phrase number -> text</span></code>. For example, "if ..., ..."
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is a phrase in Inform, but it has no kind as such: the first "..." is a
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condition, the second "..." a phrase invocation, and neither one of those
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is a value, so neither one has a kind. It follows that we are going to
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need a rather larger data structure to describe what a phrase does than
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simply a kind, and that's what we create in this section.
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</p>
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<p class="inwebparagraph">Here's a simple example from the Standard Rules:
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</p>
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<blockquote>
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<p>To sort (T - table name) in (TC - table column) order: ...</p>
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</blockquote>
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<p class="inwebparagraph">The "word sequence" for this consists of five "words": sort, 0, in, 1,
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order. That is, we store five integers: the word numbers for "sort", "in"
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and "order", and then very low integers represent tokens rather than fixed
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wording. (It follows from this that a phrase can't be defined in the first
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ten words of the source text, but that's okay, because those words can
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never be from the author's own source text anyway — they contain the
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instruction to load the Standard Rules.)
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</p>
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<p class="inwebparagraph">The tokens are the variably-worded parts written with brackets. The "token
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sequence" consists of two tokens, "T - table name" and "TC - table column".
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">MAX_TOKENS_PER_PHRASE</span><span class="plain"> 10</span>
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<span class="definitionkeyword">define</span> <span class="constant">MAX_WORDS_PER_PHRASE</span><span class="plain"> 32 </span> <span class="comment">the most the excerpt parser can hold anyway</span>
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</pre>
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<pre class="display">
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<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">ph_type_data</span><span class="plain"> {</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">wording</span><span class="plain"> </span><span class="identifier">registration_text</span><span class="plain">; </span> <span class="comment">words used to register the excerpt meaning</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">word_sequence</span><span class="plain">[</span><span class="constant">MAX_WORDS_PER_PHRASE</span><span class="plain">]; </span> <span class="comment">the "word sequence": see above</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">no_words</span><span class="plain">; </span> <span class="comment">length of the word sequence</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">phrase_token</span><span class="plain"> </span><span class="identifier">token_sequence</span><span class="plain">[</span><span class="constant">MAX_TOKENS_PER_PHRASE</span><span class="plain">];</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">no_tokens</span><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">manner_of_return</span><span class="plain">; </span> <span class="comment">one of the <code class="display"><span class="extract">*_MOR</span></code> values</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">return_kind</span><span class="plain">; </span> <span class="comment"><code class="display"><span class="extract">NULL</span></code> except in the <code class="display"><span class="extract">DECIDES_VALUE_MOR</span></code> case</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">say_details</span><span class="plain"> </span><span class="identifier">as_say</span><span class="plain">; </span> <span class="comment">used only for "say" phrases, that is, text substitutions</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">inline_details</span><span class="plain"> </span><span class="identifier">as_inline</span><span class="plain">; </span> <span class="comment">side effects for phrases like C keywords</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">now_deprecated</span><span class="plain">; </span> <span class="comment">is this a phrase likely to be withdrawn in future?</span>
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<span class="plain">} </span><span class="reserved">ph_type_data</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The structure ph_type_data is accessed in 14/ds2, 22/dptd, 25/pi, 25/ci, 25/cii, 25/cp and here.</p>
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<p class="inwebparagraph"><a id="SP3"></a><b>§3. </b>The two tokens of our example phrase, then, are each stored in one of these:
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">STANDARD_PT_CONSTRUCT</span><span class="plain"> 1 </span> <span class="comment">e.g., <code class="display"><span class="extract">12</span></code>, <code class="display"><span class="extract">number</span></code>, <code class="display"><span class="extract">open door</span></code></span>
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<span class="definitionkeyword">define</span> <span class="constant">NEW_LOCAL_PT_CONSTRUCT</span><span class="plain"> 2 </span> <span class="comment">e.g., <code class="display"><span class="extract">nonexisting number variable</span></code></span>
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<span class="definitionkeyword">define</span> <span class="constant">EXISTING_LOCAL_PT_CONSTRUCT</span><span class="plain"> 3 </span> <span class="comment">e.g., <code class="display"><span class="extract">existing number variable</span></code></span>
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<span class="definitionkeyword">define</span> <span class="constant">CONDITION_PT_CONSTRUCT</span><span class="plain"> 4 </span> <span class="comment">e.g., <code class="display"><span class="extract">a condition</span></code></span>
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<span class="definitionkeyword">define</span> <span class="constant">STORAGE_PT_CONSTRUCT</span><span class="plain"> 5 </span> <span class="comment">e.g., <code class="display"><span class="extract">storage</span></code></span>
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<span class="definitionkeyword">define</span> <span class="constant">TABLE_REFERENCE_PT_CONSTRUCT</span><span class="plain"> 6 </span> <span class="comment">e.g., <code class="display"><span class="extract">table-reference</span></code></span>
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<span class="definitionkeyword">define</span> <span class="constant">KIND_NAME_PT_CONSTRUCT</span><span class="plain"> 7 </span> <span class="comment">e.g., <code class="display"><span class="extract">name of kind</span></code></span>
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<span class="definitionkeyword">define</span> <span class="constant">VOID_PT_CONSTRUCT</span><span class="plain"> 8 </span> <span class="comment">e.g., or in fact only, <code class="display"><span class="extract">phrase</span></code></span>
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</pre>
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<pre class="display">
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<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">phrase_token</span><span class="plain"> {</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">wording</span><span class="plain"> </span><span class="identifier">token_name</span><span class="plain">; </span> <span class="comment">name</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">parse_node</span><span class="plain"> *</span><span class="identifier">to_match</span><span class="plain">; </span> <span class="comment">what we expect to find here</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">token_kind</span><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">construct</span><span class="plain">; </span> <span class="comment">one of the above values</span>
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<span class="plain">} </span><span class="reserved">phrase_token</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The structure phrase_token is accessed in 5/lp, 12/dtd, 13/kak, 13/rsfk, 14/lv, 14/ds2, 15/cp, 19/tod, 22/dptd, 25/pi, 25/ci, 25/cii and here.</p>
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<p class="inwebparagraph"><a id="SP4"></a><b>§4. </b>At first sight that structure looks a bit redundant. Why do we store both a
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specification, telling the matcher what to allow, and also a kind?
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</p>
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<p class="inwebparagraph">The answer is that the kinds hierarchy is not rich enough. "Door" is a kind,
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but "open door" is not, and nor is "even number", or
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</p>
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<blockquote>
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<p>a woman in a lighted room</p>
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</blockquote>
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<p class="inwebparagraph">It seems at first appealing to decide that "open door" (say) ought to be
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a kind, but no variable with this kind would be safe: merely by opening a
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door somewhere during play, the player could make its current value no
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longer fit its kind.
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</p>
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<p class="inwebparagraph">In order to preserve type safety, Inform forces its storage objects
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(variables, table entries, and so on) to have fixed kinds decided at compile
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time. We are allowed to create a "number that varies", but not an "even
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number that varies", because the former is a kind and the latter is not.
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This is rather like C, where variables might be declared like so:
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</p>
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<p class="inwebparagraph"></p>
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<pre class="display">
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<span class="plain">int width, height; char *name;</span>
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</pre>
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<p class="inwebparagraph">In C, the range of types which can be stored is the same as the range of
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types which can be function arguments, so for instance:
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</p>
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<p class="inwebparagraph"></p>
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<pre class="display">
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<span class="plain">int area(int width, int height) { return width*height; }</span>
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</pre>
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<p class="inwebparagraph">But whereas Inform's variables are much like C's, Inform's phrase definitions
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are not like C's functions, and they can have much more general arguments:
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</p>
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<blockquote>
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<p>To jemmy open (the barrier - a closed door): ...</p>
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</blockquote>
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<blockquote>
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<p>To repeat (P - a phrase) indefinitely: ...</p>
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</blockquote>
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<p class="inwebparagraph">We therefore need a much more general way to describe what text can appear
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in phrase arguments than a kind can provide, and this is what leads us to
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the idea of a "specification". In fact, though, even these examples are
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not general enough. Natural language is very slippery about concepts which,
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in most computing theories, are formally separate. Consider for instance
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the overloaded definition of a phrase like this one:
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</p>
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<blockquote>
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<p>To appreciate (composer - a person): ...</p>
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</blockquote>
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<blockquote>
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<p>To appreciate (composer - Alessandro Striggio): ...</p>
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</blockquote>
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<p class="inwebparagraph">The early design of Inform did not permit this, since it clearly confused
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values and types, but this lack was in fact reported as a bug — always a
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sign that users considered it a natural thing to do. Specifications therefore
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needed to be able to represent not only vague descriptions like "person",
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but also explicit identities like "Alessandro Striggio".
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</p>
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<p class="inwebparagraph">Moreover we can't store the specification alone, because then these can't be
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represented:
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</p>
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<blockquote>
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<p>(tally - arithmetic value of kind K)</p>
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</blockquote>
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<blockquote>
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<p>(name of a kind of enumerated value)</p>
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</blockquote>
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<p class="inwebparagraph"><a id="SP5"></a><b>§5. </b>Say phrases — text substitutions, that is — need more:
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</p>
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<pre class="display">
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<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">say_details</span><span class="plain"> {</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">say_phrase</span><span class="plain">; </span> <span class="comment">one of the three <code class="display"><span class="extract">*_SAY_PHRASE</span></code> values</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">say_phrase_running_on</span><span class="plain">; </span> <span class="comment">ignore implied newlines in previous invocation</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">say_phrase_stream_position</span><span class="plain">; </span> <span class="comment">one of the <code class="display"><span class="extract">SSP_*</span></code> values above</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">say_phrase_stream_token_at</span><span class="plain">; </span> <span class="comment">word number of say stream token name</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">say_phrase_stream_closing_token_at</span><span class="plain">; </span> <span class="comment">ditto for choice of ending</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">say_control_structure</span><span class="plain">; </span> <span class="comment">one of the four <code class="display"><span class="extract">*_SAY_CS</span></code> values below</span>
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<span class="plain">} </span><span class="reserved">say_details</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The structure say_details is accessed in 25/cp and here.</p>
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<p class="inwebparagraph"><a id="SP6"></a><b>§6. </b>These are for "say control structures", as in "fish [if day is Friday]of
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course[end if]" — the "[if ...]" and "[end if]" both being say phrases which
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are control structures.
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">NO_SAY_CS</span><span class="plain"> 0</span>
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<span class="definitionkeyword">define</span> <span class="constant">IF_SAY_CS</span><span class="plain"> 1</span>
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<span class="definitionkeyword">define</span> <span class="constant">OTHERWISE_SAY_CS</span><span class="plain"> 2</span>
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<span class="definitionkeyword">define</span> <span class="constant">OTHERWISE_IF_SAY_CS</span><span class="plain"> 3</span>
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<span class="definitionkeyword">define</span> <span class="constant">END_IF_SAY_CS</span><span class="plain"> 4</span>
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</pre>
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<p class="inwebparagraph"><a id="SP7"></a><b>§7. </b>The say stream is the sequence of successive invocations in a single say,
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or in a piece of text with substitutions. Some say phrases are compound in that
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they must occur in a given sequence.
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</p>
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<p class="inwebparagraph">The following markers are used to identify such say phrases:
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">SSP_NONE</span><span class="plain"> 0</span>
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<span class="definitionkeyword">define</span> <span class="constant">SSP_START</span><span class="plain"> 1</span>
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<span class="definitionkeyword">define</span> <span class="constant">SSP_MIDDLE</span><span class="plain"> 2</span>
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<span class="definitionkeyword">define</span> <span class="constant">SSP_END</span><span class="plain"> 3</span>
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</pre>
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<p class="inwebparagraph"><a id="SP8"></a><b>§8. </b>Inline phrase definitions are used to implement what, in other languages,
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would be control-structure keywords, so inline phrases sometimes need bells,
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whistles and doodads which regular phrases don't.
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</p>
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<pre class="display">
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<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">inline_details</span><span class="plain"> {</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">invoked_inline_not_as_call</span><span class="plain">; </span> <span class="comment">if <code class="display"><span class="extract">FALSE</span></code>, none of the rest applies</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">let_phrase</span><span class="plain">; </span> <span class="comment">one of the <code class="display"><span class="extract">*_LET_PHRASE</span></code> values below</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">assignment_phrase</span><span class="plain">; </span> <span class="comment"><code class="display"><span class="extract">TRUE</span></code> if this has to be typechecked as an assignment</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">arithmetical_operation</span><span class="plain">; </span> <span class="comment"><code class="display"><span class="extract">-1</span></code>, or one of the <code class="display"><span class="extract">*_OPERATION</span></code> constants</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">block_follows</span><span class="plain">; </span> <span class="comment">for inline phrases only: followed by a begin... end block?</span>
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<span class="identifier">wchar_t</span><span class="plain"> *</span><span class="identifier">only_in_loop</span><span class="plain">; </span> <span class="comment">if not null, the phrase can only be used in this block</span>
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<span class="plain">} </span><span class="reserved">inline_details</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The structure inline_details is accessed in 22/dptd, 25/pi and here.</p>
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<p class="inwebparagraph"><a id="SP9"></a><b>§9. </b>Where:
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">NOT_A_LET_PHRASE</span><span class="plain"> 0 </span> <span class="comment">needs to be 0 so that <code class="display"><span class="extract">let_phrase</span></code> can be a C condition</span>
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<span class="definitionkeyword">define</span> <span class="constant">ASSIGNMENT_LET_PHRASE</span><span class="plain"> 1 </span> <span class="comment">the regular "let"</span>
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<span class="definitionkeyword">define</span> <span class="constant">EQUATION_LET_PHRASE</span><span class="plain"> 2 </span> <span class="comment">"let" inviting Inform to solve an equation</span>
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</pre>
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<p class="inwebparagraph"><a id="SP10"></a><b>§10. Creation. </b></p>
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<pre class="display">
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<span class="reserved">ph_type_data</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::new</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
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<span class="reserved">ph_type_data</span><span class="plain"> </span><span class="identifier">phtd</span><span class="plain">;</span>
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<span class="identifier">phtd</span><span class="element">.registration_text</span><span class="plain"> = </span><span class="identifier">EMPTY_WORDING</span><span class="plain">;</span>
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<span class="identifier">phtd</span><span class="element">.manner_of_return</span><span class="plain"> = </span><span class="constant">DECIDES_NOTHING_MOR</span><span class="plain">;</span>
|
|
<span class="identifier">phtd</span><span class="element">.return_kind</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
|
|
|
|
<span class="identifier">phtd</span><span class="element">.no_words</span><span class="plain"> = 0;</span>
|
|
<span class="identifier">phtd</span><span class="element">.no_tokens</span><span class="plain"> = 0;</span>
|
|
|
|
<span class="identifier">phtd</span><span class="element">.as_say</span><span class="plain"> = </span><span class="functiontext">Phrases::TypeData::new_say_details</span><span class="plain">();</span>
|
|
<span class="identifier">phtd</span><span class="element">.as_inline</span><span class="plain"> = </span><span class="functiontext">Phrases::TypeData::new_inline_details</span><span class="plain">();</span>
|
|
|
|
<span class="identifier">phtd</span><span class="element">.now_deprecated</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">phtd</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::new is used in 22/ph (<a href="22-ph.html#SP6_3">§6.3</a>), 22/pav (<a href="22-pav.html#SP5">§5</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP11"></a><b>§11. </b>And the manner of return is set shortly after that:
|
|
</p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::set_mor</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">mor</span><span class="plain">, </span><span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">K</span><span class="plain">) {</span>
|
|
<span class="identifier">phtd</span><span class="plain">-</span><span class="element">>manner_of_return</span><span class="plain"> = </span><span class="identifier">mor</span><span class="plain">;</span>
|
|
<span class="identifier">phtd</span><span class="plain">-</span><span class="element">>return_kind</span><span class="plain"> = </span><span class="identifier">K</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::get_mor</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>manner_of_return</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="identifier">kind</span><span class="plain"> *</span><span class="functiontext">Phrases::TypeData::get_return_kind</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>manner_of_return</span><span class="plain"> == </span><span class="constant">DECIDES_CONDITION_MOR</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">K_truth_state</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>return_kind</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::set_mor is used in 22/ph (<a href="22-ph.html#SP6_3">§6.3</a>), 22/dptd (<a href="22-dptd.html#SP16">§16</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::get_mor is used in 14/rv (<a href="14-rv.html#SP23_7">§23.7</a>), 25/cii (<a href="25-cii.html#SP3_1_1_4_7_1">§3.1.1.4.7.1</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::get_return_kind is used in <a href="#SP13">§13</a>, 14/rv (<a href="14-rv.html#SP23_7">§23.7</a>), 14/ds2 (<a href="14-ds2.html#SP11_9_1_1">§11.9.1.1</a>), 20/eq (<a href="20-eq.html#SP41_3">§41.3</a>), 22/cs (<a href="22-cs.html#SP10_6">§10.6</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP12"></a><b>§12. </b></p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">char</span><span class="plain"> *</span><span class="functiontext">Phrases::TypeData::describe_manner_of_return</span><span class="plain">(</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">mor</span><span class="plain">, </span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">, </span><span class="identifier">kind</span><span class="plain"> **</span><span class="identifier">K</span><span class="plain">) {</span>
|
|
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">mor</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">DECIDES_NOTHING_MOR</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="string">"no value resulting"</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">DECIDES_VALUE_MOR</span><span class="plain">:</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">phtd</span><span class="plain">) && (</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>return_kind</span><span class="plain">) && (</span><span class="identifier">K</span><span class="plain">)) *</span><span class="identifier">K</span><span class="plain"> = </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>return_kind</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="string">"a phrase to decide a value"</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">DECIDES_CONDITION_MOR</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="string">"a phrase to make a decision"</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">DECIDES_NOTHING_AND_RETURNS_MOR</span><span class="plain">:</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="string">"a phrase providing an outcome to a rulebook"</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="string">"some phrase"</span><span class="plain">; </span> <span class="comment">should never actually be needed</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::describe_manner_of_return is used in 22/dptd (<a href="22-dptd.html#SP1">§1</a>), 25/ci (<a href="25-ci.html#SP3_1_1_2">§3.1.1.2</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP13"></a><b>§13. The kind of a phrase. </b>As noted above, phrases can be such that "kind" is meaningless (consider "if",
|
|
or "now"), but it might be tempting to think that for function-like phrases,
|
|
at least, the kind tells you everything about when they apply. But this isn't
|
|
true. Consider:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>To barricade (D - a door): ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<blockquote>
|
|
<p>To barricade (D - a closed door): ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<p class="inwebparagraph">These both have the same kind, <code class="display"><span class="extract">phrase door -> nothing</span></code>, and that's reasonable
|
|
because they're safe to use in the same circumstances. But they will apply
|
|
in different circumstances at run-time.
|
|
</p>
|
|
|
|
<p class="inwebparagraph">A further subtlety comes with phrases like:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>To juxtapose (name of kind of value K) with (alpha - K) and (beta - K): ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<p class="inwebparagraph">What's the kind of this? From the point of view of compilation, it's
|
|
</p>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="plain">phrase (K, K) -> nothing</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph">but this is not quite right, because it doesn't make clear how Inform is to
|
|
infer the kind K — should it take it from the value supplied as alpha, or
|
|
beta? This makes a difference in some cases of ambiguity. The answer of
|
|
course is neither: for example, when Inform reads
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>juxtapose numbers with 12 and 31;</p>
|
|
|
|
</blockquote>
|
|
|
|
<p class="inwebparagraph">it sets K to "number" from the explicit text "numbers", rather than inferring
|
|
it from the 12 or the 31. So, internally, Inform regards the kind of this
|
|
phrase as
|
|
</p>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="plain">phrase (K, K, K) -> nothing</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph">even though it will compile actual function calls to "juxtapose" with two
|
|
rather than three arguments. (This is all a sort of poor man's second-order
|
|
logic, since one argument is in effect a kind rather than a value.)
|
|
</p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="identifier">kind</span><span class="plain"> *</span><span class="functiontext">Phrases::TypeData::kind</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">argument_kinds</span><span class="plain">[</span><span class="constant">MAX_TOKENS_PER_PHRASE</span><span class="plain">];</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">, </span><span class="identifier">j</span><span class="plain"> = 0;</span>
|
|
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++)</span>
|
|
<span class="identifier">argument_kinds</span><span class="plain">[</span><span class="identifier">j</span><span class="plain">++] = </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.token_kind</span><span class="plain">;</span>
|
|
<span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">R</span><span class="plain"> = </span><span class="functiontext">Phrases::TypeData::get_return_kind</span><span class="plain">(</span><span class="identifier">phtd</span><span class="plain">);</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">Kinds::function_kind</span><span class="plain">(</span><span class="identifier">j</span><span class="plain">, </span><span class="identifier">argument_kinds</span><span class="plain">, </span><span class="identifier">R</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::kind is used in <a href="#SP14">§14</a>, 20/eq (<a href="20-eq.html#SP48">§48</a>), 22/cs (<a href="22-cs.html#SP10_5">§10.5</a>), 22/ph (<a href="22-ph.html#SP6_5">§6.5</a>), 22/dptd (<a href="22-dptd.html#SP6_5">§6.5</a>), 22/pav (<a href="22-pav.html#SP5">§5</a>), 25/pi (<a href="25-pi.html#SP3">§3</a>), 25/cp (<a href="25-cp.html#SP3_2">§3.2</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP14"></a><b>§14. </b>Whence:
|
|
</p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::contains_variables</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">return</span>
|
|
<span class="identifier">Kinds::contains</span><span class="plain">(</span>
|
|
<span class="functiontext">Phrases::TypeData::kind</span><span class="plain">(</span><span class="identifier">phtd</span><span class="plain">),</span>
|
|
<span class="identifier">CON_KIND_VARIABLE</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::contains_variables is used in 14/ds2 (<a href="14-ds2.html#SP11_9_1_1_4">§11.9.1.1.4</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP15"></a><b>§15. </b>More specifically:
|
|
</p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::tokens_contain_variable</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">v</span><span class="plain">) {</span>
|
|
<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++)</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Kinds::Behaviour::involves_var</span><span class="plain">(</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.token_kind</span><span class="plain">, </span><span class="identifier">v</span><span class="plain">))</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::tokens_contain_variable is used in 22/cs (<a href="22-cs.html#SP10_6">§10.6</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP16"></a><b>§16. The tokens. </b></p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::get_no_tokens</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::get_no_tokens is used in 25/in (<a href="25-in.html#SP18">§18</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP17"></a><b>§17. </b></p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::index_of_token_creating_a_variable</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">;</span>
|
|
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++)</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.construct</span><span class="plain"> == </span><span class="constant">NEW_LOCAL_PT_CONSTRUCT</span><span class="plain">)</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> -1;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::index_of_token_creating_a_variable appears nowhere else.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP18"></a><b>§18. </b>This odd-looking question is asked when handling the ambiguity between the
|
|
name of a property ("carrying capacity", say) as a value in its own right,
|
|
and the same name metonymically referring to the value of the property for
|
|
a given instance ("carrying capacity of the player", say).
|
|
</p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::preamble_requires_property_value</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">;</span>
|
|
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Lvalues::get_storage_form</span><span class="plain">(</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.to_match</span><span class="plain">)</span>
|
|
<span class="plain">== </span><span class="constant">PROPERTY_VALUE_NT</span><span class="plain">)</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::preamble_requires_property_value appears nowhere else.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP19"></a><b>§19. Deprecation. </b>Phrases which are "deprecated" are those defined by the Standard Rules, or
|
|
other extensions in the standard Inform installation, which we now think are
|
|
redundant or a bad idea: we don't want to withdraw them without warning, so
|
|
the procedure is to deprecate them in one major build and withdraw them
|
|
in the next.
|
|
</p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::deprecated</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>now_deprecated</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::deprecate_phrase</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="identifier">phtd</span><span class="plain">-</span><span class="element">>now_deprecated</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::deprecated is used in 22/dptd (<a href="22-dptd.html#SP6_6">§6.6</a>), 22/pi (<a href="22-pi.html#SP1_3">§1.3</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::deprecate_phrase is used in 22/dptd (<a href="22-dptd.html#SP17">§17</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP20"></a><b>§20. Adding token names to a stack frame. </b>Suppose Inform is compiling code to represent this:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>To sort (T - table name) in (TC - table column) order: ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<p class="inwebparagraph">On the stack frame for this code, "T" and "TC" will need to be local
|
|
variables — that is, they will need to be locally available as names,
|
|
referring to the values which the phrase was called with.
|
|
</p>
|
|
|
|
<p class="inwebparagraph">In that simple example, the phrase preamble makes clear what the kinds of
|
|
"T" and "TC" should be, but it isn't always so simple. For example:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>To add (new entry - K) to (L - list of values of kind K): ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<p class="inwebparagraph">Here the preamble allows a wide range of kinds, and Inform compiles
|
|
different versions of the code for each value of K actually needed. So
|
|
the following routine is called with a particular kind to be used. For
|
|
instance, if the source text ever contains an invocation like:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>add 14 to the list of scores;</p>
|
|
|
|
</blockquote>
|
|
|
|
<p class="inwebparagraph">then at some point Inform will have to compile a version of the phrase
|
|
which has the kind:
|
|
</p>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="plain">phrase (number, list of numbers) -> nothing</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph">The routine below then dismantles that kind to extract the kinds of the
|
|
arguments, "number" and then "list of numbers", and creates local
|
|
variables "new entry" and "L" with those kinds.
|
|
</p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::into_stack_frame</span><span class="plain">(</span><span class="reserved">ph_stack_frame</span><span class="plain"> *</span><span class="identifier">phsf</span><span class="plain">,</span>
|
|
<span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">, </span><span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">kind_in_this_compilation</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">first</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Kinds::get_construct</span><span class="plain">(</span><span class="identifier">kind_in_this_compilation</span><span class="plain">) != </span><span class="identifier">CON_phrase</span><span class="plain">)</span>
|
|
<span class="identifier">internal_error</span><span class="plain">(</span><span class="string">"no function kind"</span><span class="plain">);</span>
|
|
|
|
<span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">args</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">, *</span><span class="identifier">ret</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
|
|
<span class="identifier">Kinds::binary_construction_material</span><span class="plain">(</span><span class="identifier">kind_in_this_compilation</span><span class="plain">, &</span><span class="identifier">args</span><span class="plain">, &</span><span class="identifier">ret</span><span class="plain">);</span>
|
|
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">;</span>
|
|
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) {</span>
|
|
<span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">K</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Kinds::get_construct</span><span class="plain">(</span><span class="identifier">args</span><span class="plain">) != </span><span class="identifier">CON_TUPLE_ENTRY</span><span class="plain">) </span><span class="identifier">internal_error</span><span class="plain">(</span><span class="string">"bad tupling"</span><span class="plain">);</span>
|
|
<span class="identifier">Kinds::binary_construction_material</span><span class="plain">(</span><span class="identifier">args</span><span class="plain">, &</span><span class="identifier">K</span><span class="plain">, &</span><span class="identifier">args</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">first</span><span class="plain">) {</span>
|
|
<span class="functiontext">LocalVariables::add_call_parameter</span><span class="plain">(</span><span class="identifier">phsf</span><span class="plain">, </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.token_name</span><span class="plain">, </span><span class="identifier">K</span><span class="plain">);</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
|
|
<span class="reserved">local_variable</span><span class="plain"> *</span><span class="identifier">lvar</span><span class="plain"> = </span><span class="functiontext">LocalVariables::get_ith_parameter</span><span class="plain">(</span><span class="identifier">i</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">lvar</span><span class="plain">) </span><span class="functiontext">LocalVariables::set_kind</span><span class="plain">(</span><span class="identifier">lvar</span><span class="plain">, </span><span class="identifier">K</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Kinds::Compare::eq</span><span class="plain">(</span><span class="identifier">ret</span><span class="plain">, </span><span class="identifier">K_nil</span><span class="plain">)) </span><span class="functiontext">Frames::set_kind_returned</span><span class="plain">(</span><span class="identifier">phsf</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
|
|
<span class="reserved">else</span><span class="plain"> </span><span class="functiontext">Frames::set_kind_returned</span><span class="plain">(</span><span class="identifier">phsf</span><span class="plain">, </span><span class="identifier">ret</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::into_stack_frame is used in 22/ph (<a href="22-ph.html#SP6_5">§6.5</a>), 25/cp (<a href="25-cp.html#SP3_2">§3.2</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP21"></a><b>§21. Comparison of PHTDs. </b>This is used when sorting "To..." phrases in order of logical priority:
|
|
see Phrases for the return codes.
|
|
</p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::comparison</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd1</span><span class="plain">, </span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd2</span><span class="plain">) {</span>
|
|
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd1</span><span class="plain"> == </span><span class="identifier">phtd2</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">EQUAL_PH</span><span class="plain">;</span>
|
|
|
|
<<span class="cwebmacro">Loop construct keywords have priority</span> <span class="cwebmacronumber">21.1</span>><span class="plain">;</span>
|
|
<<span class="cwebmacro">More fixed words beats fewer</span> <span class="cwebmacronumber">21.2</span>><span class="plain">;</span>
|
|
<<span class="cwebmacro">More tokens beats fewer</span> <span class="cwebmacronumber">21.3</span>><span class="plain">;</span>
|
|
<<span class="cwebmacro">Next use alphabetical order, counting tokens as after the Zs</span> <span class="cwebmacronumber">21.4</span>><span class="plain">;</span>
|
|
<<span class="cwebmacro">Finally try comparing the to-match specifications of the tokens</span> <span class="cwebmacronumber">21.5</span>><span class="plain">;</span>
|
|
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="constant">INCOMPARABLE_PH</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::comparison is used in 22/tp (<a href="22-tp.html#SP4">§4</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP21_1"></a><b>§21.1. </b><code class="display">
|
|
<<span class="cwebmacrodefn">Loop construct keywords have priority</span> <span class="cwebmacronumber">21.1</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain"> = </span><span class="functiontext">Phrases::TypeData::inline_type_data_comparison</span><span class="plain">(</span><span class="identifier">phtd1</span><span class="plain">, </span><span class="identifier">phtd2</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain"> != </span><span class="constant">EQUAL_PH</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">;</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP21">§21</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP21_2"></a><b>§21.2. </b><code class="display">
|
|
<<span class="cwebmacrodefn">More fixed words beats fewer</span> <span class="cwebmacronumber">21.2</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">fw1</span><span class="plain"> = </span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>no_words</span><span class="plain"> - </span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">;</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">fw2</span><span class="plain"> = </span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>no_words</span><span class="plain"> - </span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">fw1</span><span class="plain"> > </span><span class="identifier">fw2</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">BEFORE_PH</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">fw1</span><span class="plain"> < </span><span class="identifier">fw2</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">AFTER_PH</span><span class="plain">;</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP21">§21</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP21_3"></a><b>§21.3. </b><code class="display">
|
|
<<span class="cwebmacrodefn">More tokens beats fewer</span> <span class="cwebmacronumber">21.3</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain"> > </span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">BEFORE_PH</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain"> < </span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">AFTER_PH</span><span class="plain">;</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP21">§21</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP21_4"></a><b>§21.4. </b>At this point the two phrases have the same number of words and tokens,
|
|
but the words may be different and/or the tokens in different places.
|
|
We might for example be comparing these two:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>To grab (the prize - an object) swiftly: ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<blockquote>
|
|
<p>To grab at (the rosette - an object): ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<p class="inwebparagraph">We alphabetical order, placing "grab ZZZZZZ swiftly" after "grab at ZZZZZZ".
|
|
</p>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">Next use alphabetical order, counting tokens as after the Zs</span> <span class="cwebmacronumber">21.4</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">;</span>
|
|
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>no_words</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>word_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">] < </span><span class="constant">MAX_TOKENS_PER_PHRASE</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>word_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">] >= </span><span class="constant">MAX_TOKENS_PER_PHRASE</span><span class="plain">)</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="constant">AFTER_PH</span><span class="plain">;</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>word_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">] < </span><span class="constant">MAX_TOKENS_PER_PHRASE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">BEFORE_PH</span><span class="plain">;</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">x</span><span class="plain"> = </span><span class="identifier">Wide::cmp</span><span class="plain">(</span>
|
|
<span class="identifier">Lexer::word_raw_text</span><span class="plain">(</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>word_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]),</span>
|
|
<span class="identifier">Lexer::word_raw_text</span><span class="plain">(</span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>word_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]));</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">x</span><span class="plain"> > 0) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">AFTER_PH</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">x</span><span class="plain"> < 0) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">BEFORE_PH</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP21">§21</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP21_5"></a><b>§21.5. </b>Now our two phrases have identical wording, and tokens in the same positions,
|
|
but may have different specifications for them. For example:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>To grab at (the rosette - an object): ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<blockquote>
|
|
<p>To grab at (the rosette - a thing on the table): ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<p class="inwebparagraph">We give priority to the second of these, because it's more specific. On
|
|
the other hand these are simply incomparable:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>To grab at (the rosette - an object): ...</p>
|
|
|
|
</blockquote>
|
|
|
|
<blockquote>
|
|
<p>To grab at (the prime - a number): ...</p>
|
|
|
|
</blockquote>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">Finally try comparing the to-match specifications of the tokens</span> <span class="cwebmacronumber">21.5</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">, </span><span class="identifier">possibly_subschema</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">, </span><span class="identifier">possibly_superschema</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>no_tokens</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) {</span>
|
|
<span class="identifier">parse_node</span><span class="plain"> *</span><span class="identifier">spec1</span><span class="plain"> = </span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.to_match</span><span class="plain">;</span>
|
|
<span class="identifier">parse_node</span><span class="plain"> *</span><span class="identifier">spec2</span><span class="plain"> = </span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.to_match</span><span class="plain">;</span>
|
|
<<span class="cwebmacro">See if the ith token rules out being a sub- or superschema</span> <span class="cwebmacronumber">21.5.2</span>><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">possibly_subschema</span><span class="plain">) || (</span><span class="identifier">possibly_superschema</span><span class="plain">))</span>
|
|
<<span class="cwebmacro">These are worryingly similar in wording, so check the return kinds</span> <span class="cwebmacronumber">21.5.1</span>><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">possibly_subschema</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">SUBSCHEMA_PH</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">possibly_superschema</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">SUPERSCHEMA_PH</span><span class="plain">;</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP21">§21</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP21_5_1"></a><b>§21.5.1. </b>We need to watch out for this sort of thing:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>To decide what number is my special value: decide on 4.</p>
|
|
|
|
</blockquote>
|
|
|
|
<blockquote>
|
|
<p>To decide what person is my special value: decide on the player.</p>
|
|
|
|
</blockquote>
|
|
|
|
<p class="inwebparagraph">which makes "my special value" of a kind which can't be decided; but
|
|
we can't just compare the return kinds, because that might pick up
|
|
false positives in the case of kind variables, etc.
|
|
</p>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">These are worryingly similar in wording, so check the return kinds</span> <span class="cwebmacronumber">21.5.1</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>manner_of_return</span><span class="plain"> != </span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>manner_of_return</span><span class="plain">) ||</span>
|
|
<span class="plain">((</span><span class="identifier">Kinds::Compare::eq</span><span class="plain">(</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>return_kind</span><span class="plain">, </span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>return_kind</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">) &&</span>
|
|
<span class="plain">(</span><span class="identifier">Kinds::Behaviour::definite</span><span class="plain">(</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>return_kind</span><span class="plain">))))</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="constant">CONFLICTED_PH</span><span class="plain">;</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP21_5">§21.5</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP21_5_2"></a><b>§21.5.2. </b>We delegate to <code class="display"><span class="extract">Specifications::compare_specificity</span></code> to decide what's more
|
|
specific, but note that this routine can return 0 (meaning, equally
|
|
specific) for two different reasons: because the specifications are basically
|
|
the same as each other, or because they're completely different but have
|
|
about the same complexity. The <code class="display"><span class="extract">wont_mix</span></code> flag is set in the latter case.
|
|
</p>
|
|
|
|
<p class="inwebparagraph">Because the test is made by seeing if one specification matches another, we
|
|
also protect it from the special "nonexisting variable" tokens,
|
|
used only in inline phrase preambles. It would otherwise think "existing
|
|
variable" is more specific than "new variable", which isn't helpful.
|
|
</p>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">See if the ith token rules out being a sub- or superschema</span> <span class="cwebmacronumber">21.5.2</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.construct</span><span class="plain"> == </span><span class="constant">NEW_LOCAL_PT_CONSTRUCT</span><span class="plain">) &&</span>
|
|
<span class="plain">(</span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.construct</span><span class="plain"> != </span><span class="constant">NEW_LOCAL_PT_CONSTRUCT</span><span class="plain">)) {</span>
|
|
<span class="identifier">possibly_superschema</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.construct</span><span class="plain"> != </span><span class="constant">NEW_LOCAL_PT_CONSTRUCT</span><span class="plain">) &&</span>
|
|
<span class="plain">(</span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]</span><span class="element">.construct</span><span class="plain"> == </span><span class="constant">NEW_LOCAL_PT_CONSTRUCT</span><span class="plain">)) {</span>
|
|
<span class="identifier">possibly_subschema</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">wont_mix</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">r</span><span class="plain"> = </span><span class="functiontext">Specifications::compare_specificity</span><span class="plain">(</span><span class="identifier">spec1</span><span class="plain">, </span><span class="identifier">spec2</span><span class="plain">, &</span><span class="identifier">wont_mix</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">wont_mix</span><span class="plain">) { </span><span class="identifier">possibly_subschema</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">; </span><span class="identifier">possibly_superschema</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">; }</span>
|
|
<span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">r</span><span class="plain"> < 0) </span><span class="identifier">possibly_subschema</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">r</span><span class="plain"> > 0) </span><span class="identifier">possibly_superschema</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP21_5">§21.5</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP22"></a><b>§22. Say phrases. </b></p>
|
|
|
|
|
|
<pre class="definitions">
|
|
<span class="definitionkeyword">define</span> <span class="constant">NOT_A_SAY_PHRASE</span><span class="plain"> 0 </span> <span class="comment">needs to be 0 so that <code class="display"><span class="extract">sd.say_phrase</span></code> can be a C condition</span>
|
|
<span class="definitionkeyword">define</span> <span class="constant">A_MISCELLANEOUS_SAY_PHRASE</span><span class="plain"> 1</span>
|
|
<span class="definitionkeyword">define</span> <span class="constant">THE_PRIMORDIAL_SAY_PHRASE</span><span class="plain"> 2</span>
|
|
</pre>
|
|
|
|
<pre class="display">
|
|
<span class="reserved">say_details</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::new_say_details</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
|
|
<span class="reserved">say_details</span><span class="plain"> </span><span class="identifier">sd</span><span class="plain">;</span>
|
|
<span class="identifier">sd</span><span class="element">.say_phrase</span><span class="plain"> = </span><span class="constant">NOT_A_SAY_PHRASE</span><span class="plain">;</span>
|
|
<span class="identifier">sd</span><span class="element">.say_phrase_running_on</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="identifier">sd</span><span class="element">.say_control_structure</span><span class="plain"> = </span><span class="constant">NO_SAY_CS</span><span class="plain">;</span>
|
|
<span class="identifier">sd</span><span class="element">.say_phrase_stream_position</span><span class="plain"> = </span><span class="constant">SSP_NONE</span><span class="plain">;</span>
|
|
<span class="identifier">sd</span><span class="element">.say_phrase_stream_token_at</span><span class="plain"> = -1;</span>
|
|
<span class="identifier">sd</span><span class="element">.say_phrase_stream_closing_token_at</span><span class="plain"> = -1;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">sd</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">first_say_made</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
|
|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::make_sd</span><span class="plain">(</span><span class="reserved">say_details</span><span class="plain"> *</span><span class="identifier">sd</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">ro</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">cs</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">pos</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">at</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">cat</span><span class="plain">) {</span>
|
|
<span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_phrase</span><span class="plain"> = </span><span class="constant">A_MISCELLANEOUS_SAY_PHRASE</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">first_say_made</span><span class="plain"> == </span><span class="identifier">FALSE</span><span class="plain">) {</span>
|
|
<span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_phrase</span><span class="plain"> = </span><span class="constant">THE_PRIMORDIAL_SAY_PHRASE</span><span class="plain">;</span>
|
|
<span class="identifier">first_say_made</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_phrase_running_on</span><span class="plain"> = </span><span class="identifier">ro</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">cs</span><span class="plain"> >= 0) </span><span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_control_structure</span><span class="plain"> = </span><span class="identifier">cs</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">pos</span><span class="plain"> >= 0) </span><span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_phrase_stream_position</span><span class="plain"> = </span><span class="identifier">pos</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">at</span><span class="plain"> >= 0) </span><span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_phrase_stream_token_at</span><span class="plain"> = </span><span class="identifier">at</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">cat</span><span class="plain"> >= 0) </span><span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_phrase_stream_closing_token_at</span><span class="plain"> = </span><span class="identifier">cat</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::log_say_details</span><span class="plain">(</span><span class="reserved">say_details</span><span class="plain"> </span><span class="identifier">sd</span><span class="plain">) {</span>
|
|
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">sd</span><span class="element">.say_phrase</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOT_A_SAY_PHRASE</span><span class="plain">: </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">A_MISCELLANEOUS_SAY_PHRASE</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" A_MISCELLANEOUS_SAY_PHRASE\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">THE_PRIMORDIAL_SAY_PHRASE</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" THE_PRIMORDIAL_SAY_PHRASE\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">default</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" <invalid say phrase status>\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">sd</span><span class="element">.say_phrase_running_on</span><span class="plain">)</span>
|
|
<span class="identifier">LOG</span><span class="plain">(</span><span class="string">" running on from previous say invocation without implied newline\</span><span class="plain">n</span><span class="string">"</span><span class="plain">);</span>
|
|
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">sd</span><span class="element">.say_control_structure</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NO_SAY_CS</span><span class="plain">: </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">IF_SAY_CS</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" IF_SAY_CS\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">END_IF_SAY_CS</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" END_IF_SAY_CS\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">OTHERWISE_SAY_CS</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" OTHERWISE_SAY_CS\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">OTHERWISE_IF_SAY_CS</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" OTHERWISE_IF_SAY_CS\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">default</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" <invalid say phrase status>\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::is_a_say_phrase</span><span class="plain">(</span><span class="reserved">phrase</span><span class="plain"> *</span><span class="identifier">ph</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">ph</span><span class="plain">) && (</span><span class="identifier">ph</span><span class="plain">-</span><span class="element">>type_data.as_say.say_phrase</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::is_a_say_X_phrase</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>as_say.say_phrase</span><span class="plain"> == </span><span class="constant">NOT_A_SAY_PHRASE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>no_words</span><span class="plain"> == 2) && (</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>word_sequence</span><span class="plain">[1] < </span><span class="constant">MAX_TOKENS_PER_PHRASE</span><span class="plain">))</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::is_a_spare_say_X_phrase</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>as_say.say_phrase</span><span class="plain"> == </span><span class="constant">NOT_A_SAY_PHRASE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>no_words</span><span class="plain"> == 2) && (</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>word_sequence</span><span class="plain">[1] < </span><span class="constant">MAX_TOKENS_PER_PHRASE</span><span class="plain">)) {</span>
|
|
<span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">K</span><span class="plain"> = </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>token_sequence</span><span class="plain">[0]</span><span class="element">.token_kind</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">K</span><span class="plain">) && (</span><span class="identifier">Kinds::Behaviour::definite</span><span class="plain">(</span><span class="identifier">K</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::is_the_primordial_say</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>as_say.say_phrase</span><span class="plain"> == </span><span class="constant">THE_PRIMORDIAL_SAY_PHRASE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
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|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::get_say_data</span><span class="plain">(</span><span class="reserved">say_details</span><span class="plain"> *</span><span class="identifier">sd</span><span class="plain">,</span>
|
|
<span class="reserved">int</span><span class="plain"> *</span><span class="identifier">say_cs</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> *</span><span class="identifier">ssp_tok</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> *</span><span class="identifier">ssp_ctok</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> *</span><span class="identifier">ssp_pos</span><span class="plain">) {</span>
|
|
<span class="plain">*</span><span class="identifier">say_cs</span><span class="plain"> = </span><span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_control_structure</span><span class="plain">;</span>
|
|
<span class="plain">*</span><span class="identifier">ssp_tok</span><span class="plain"> = </span><span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_phrase_stream_token_at</span><span class="plain">;</span>
|
|
<span class="plain">*</span><span class="identifier">ssp_ctok</span><span class="plain"> = </span><span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_phrase_stream_closing_token_at</span><span class="plain">;</span>
|
|
<span class="plain">*</span><span class="identifier">ssp_pos</span><span class="plain"> = </span><span class="identifier">sd</span><span class="plain">-</span><span class="element">>say_phrase_stream_position</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::preface_for_say_HTML</span><span class="plain">(</span><span class="identifier">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">say_details</span><span class="plain"> </span><span class="identifier">sd</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">paste_format</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">sd</span><span class="element">.say_phrase</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">sd</span><span class="element">.say_phrase</span><span class="plain"> != </span><span class="constant">THE_PRIMORDIAL_SAY_PHRASE</span><span class="plain">) {</span>
|
|
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">paste_format</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">PASTE_PHRASE_FORMAT</span><span class="plain">: </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"["</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">INDEX_PHRASE_FORMAT</span><span class="plain">: </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"say \</span><span class="plain">"</span><span class="string">["</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
|
|
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">paste_format</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">PASTE_PHRASE_FORMAT</span><span class="plain">: </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"say \</span><span class="plain">"</span><span class="string">\</span><span class="plain">"</span><span class="string">"</span><span class="plain">); </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">INDEX_PHRASE_FORMAT</span><span class="plain">: </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"say \</span><span class="plain">"</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::epilogue_for_say_HTML</span><span class="plain">(</span><span class="identifier">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">say_details</span><span class="plain"> </span><span class="identifier">sd</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">paste_format</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">sd</span><span class="element">.say_phrase</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">sd</span><span class="element">.say_phrase</span><span class="plain"> != </span><span class="constant">THE_PRIMORDIAL_SAY_PHRASE</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">paste_format</span><span class="plain"> == </span><span class="constant">PASTE_PHRASE_FORMAT</span><span class="plain">) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"]"</span><span class="plain">);</span>
|
|
<span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">paste_format</span><span class="plain"> == </span><span class="constant">INDEX_PHRASE_FORMAT</span><span class="plain">) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"]\</span><span class="plain">"</span><span class="string">"</span><span class="plain">);</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">paste_format</span><span class="plain"> == </span><span class="constant">INDEX_PHRASE_FORMAT</span><span class="plain">) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"\</span><span class="plain">"</span><span class="string">"</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::ssp_matches</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">ssp_tok</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">list_pos</span><span class="plain">,</span>
|
|
<span class="identifier">wording</span><span class="plain"> *</span><span class="identifier">W</span><span class="plain">) {</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">this_tok</span><span class="plain"> = </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>as_say.say_phrase_stream_token_at</span><span class="plain">;</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">this_pos</span><span class="plain"> = </span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>as_say.say_phrase_stream_position</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">this_tok</span><span class="plain"> == -1) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">this_pos</span><span class="plain"> != </span><span class="identifier">list_pos</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">compare_words</span><span class="plain">(</span><span class="identifier">ssp_tok</span><span class="plain">, </span><span class="identifier">this_tok</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">*</span><span class="identifier">W</span><span class="plain"> = </span><span class="identifier">Wordings::trim_first_word</span><span class="plain">(</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>registration_text</span><span class="plain">); </span> <span class="comment">to remove the word "say"</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::new_say_details is used in <a href="#SP10">§10</a>.</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::make_sd is used in 22/dptd (<a href="22-dptd.html#SP17_2">§17.2</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::log_say_details is used in 22/dptd (<a href="22-dptd.html#SP1">§1</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::is_a_say_phrase is used in 14/ds2 (<a href="14-ds2.html#SP11_9_1_1_8">§11.9.1.1.8</a>), 22/dptd (<a href="22-dptd.html#SP6_5">§6.5</a>), 25/in (<a href="25-in.html#SP22">§22</a>), 25/pi (<a href="25-pi.html#SP2">§2</a>), 25/cp (<a href="25-cp.html#SP5_2_1">§5.2.1</a>, <a href="25-cp.html#SP6">§6</a>, <a href="25-cp.html#SP8_1">§8.1</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::is_a_say_X_phrase is used in 14/ds2 (<a href="14-ds2.html#SP15_1">§15.1</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::is_a_spare_say_X_phrase is used in 14/ds2 (<a href="14-ds2.html#SP10_1_1">§10.1.1</a>, <a href="14-ds2.html#SP10_1_1_2">§10.1.1.2</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::is_the_primordial_say is used in 10/cap (<a href="10-cap.html#SP12_1">§12.1</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::get_say_data is used in 25/cp (<a href="25-cp.html#SP8_1">§8.1</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::preface_for_say_HTML is used in 22/dptd (<a href="22-dptd.html#SP3">§3</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::epilogue_for_say_HTML is used in 22/dptd (<a href="22-dptd.html#SP3">§3</a>).</p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::ssp_matches is used in 25/cp (<a href="25-cp.html#SP9">§9</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP23"></a><b>§23. Inline phrases. </b>On some platforms, notably Android, <code class="display"><span class="extract">inline</span></code> is a reserved word in some versions
|
|
of <code class="display"><span class="extract">gcc</span></code>, so we need to be careful not to call any variables or structure members
|
|
by than name.
|
|
</p>
|
|
|
|
|
|
<pre class="definitions">
|
|
<span class="definitionkeyword">define</span> <span class="constant">NO_BLOCK_FOLLOWS</span><span class="plain"> 0 </span> <span class="comment">this needs to be 0, to make if conditions work</span>
|
|
<span class="definitionkeyword">define</span> <span class="constant">MISCELLANEOUS_BLOCK_FOLLOWS</span><span class="plain"> 1</span>
|
|
<span class="definitionkeyword">define</span> <span class="constant">CONDITIONAL_BLOCK_FOLLOWS</span><span class="plain"> 2</span>
|
|
<span class="definitionkeyword">define</span> <span class="constant">LOOP_BODY_BLOCK_FOLLOWS</span><span class="plain"> 3</span>
|
|
</pre>
|
|
|
|
<pre class="display">
|
|
<span class="reserved">inline_details</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::new_inline_details</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
|
|
<span class="reserved">inline_details</span><span class="plain"> </span><span class="identifier">id</span><span class="plain">;</span>
|
|
|
|
<span class="identifier">id</span><span class="element">.invoked_inline_not_as_call</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
|
|
<span class="identifier">id</span><span class="element">.let_phrase</span><span class="plain"> = </span><span class="constant">NOT_A_LET_PHRASE</span><span class="plain">;</span>
|
|
<span class="identifier">id</span><span class="element">.block_follows</span><span class="plain"> = </span><span class="constant">NO_BLOCK_FOLLOWS</span><span class="plain">;</span>
|
|
<span class="identifier">id</span><span class="element">.only_in_loop</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
|
|
<span class="identifier">id</span><span class="element">.assignment_phrase</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="identifier">id</span><span class="element">.arithmetical_operation</span><span class="plain"> = -1;</span>
|
|
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">id</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::new_inline_details is used in <a href="#SP10">§10</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP24"></a><b>§24. </b></p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">no_lets_made</span><span class="plain"> = 0;</span>
|
|
|
|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::make_id</span><span class="plain">(</span><span class="reserved">inline_details</span><span class="plain"> *</span><span class="identifier">id</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">op</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">assgn</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">let</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">blk</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">only_in</span><span class="plain">) {</span>
|
|
<span class="identifier">id</span><span class="plain">-</span><span class="element">>arithmetical_operation</span><span class="plain"> = </span><span class="identifier">op</span><span class="plain">;</span>
|
|
<span class="identifier">id</span><span class="plain">-</span><span class="element">>assignment_phrase</span><span class="plain"> = </span><span class="identifier">assgn</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">let</span><span class="plain"> == </span><span class="constant">ASSIGNMENT_LET_PHRASE</span><span class="plain">) && (</span><span class="identifier">no_lets_made</span><span class="plain">++ >= 3)) </span><span class="identifier">let</span><span class="plain"> = </span><span class="constant">NOT_A_LET_PHRASE</span><span class="plain">;</span>
|
|
<span class="identifier">id</span><span class="plain">-</span><span class="element">>let_phrase</span><span class="plain"> = </span><span class="identifier">let</span><span class="plain">;</span>
|
|
<span class="identifier">id</span><span class="plain">-</span><span class="element">>block_follows</span><span class="plain"> = </span><span class="identifier">blk</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">only_in</span><span class="plain"> == -1) </span><span class="identifier">id</span><span class="plain">-</span><span class="element">>only_in_loop</span><span class="plain"> = </span><span class="identifier">L</span><span class="string">"loop"</span><span class="plain">;</span>
|
|
<span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">only_in</span><span class="plain"> > 0) </span><span class="identifier">id</span><span class="plain">-</span><span class="element">>only_in_loop</span><span class="plain"> = </span><span class="identifier">Lexer::word_text</span><span class="plain">(</span><span class="identifier">only_in</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::make_id is used in 22/dptd (<a href="22-dptd.html#SP17">§17</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP25"></a><b>§25. </b></p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::log_inline_details</span><span class="plain">(</span><span class="reserved">inline_details</span><span class="plain"> </span><span class="identifier">id</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">id</span><span class="element">.block_follows</span><span class="plain">) </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" block follows\</span><span class="plain">n</span><span class="string">"</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">id</span><span class="element">.let_phrase</span><span class="plain"> != </span><span class="constant">NOT_A_LET_PHRASE</span><span class="plain">) </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" let phrase (%d)\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">id</span><span class="element">.let_phrase</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">id</span><span class="element">.only_in_loop</span><span class="plain">) </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" may only be used in a %w body\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">id</span><span class="element">.only_in_loop</span><span class="plain">);</span>
|
|
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">id</span><span class="element">.invoked_inline_not_as_call</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" invoked inline\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">: </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">" invoked by I6 function call\</span><span class="plain">n</span><span class="string">"</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Phrases::TypeData::log_inline_details is used in 22/dptd (<a href="22-dptd.html#SP1">§1</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP26"></a><b>§26. </b></p>
|
|
|
|
|
|
<pre class="display">
|
|
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::make_inline</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
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<span class="identifier">phtd</span><span class="plain">-</span><span class="element">>as_inline.invoked_inline_not_as_call</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::invoked_inline</span><span class="plain">(</span><span class="reserved">phrase</span><span class="plain"> *</span><span class="identifier">ph</span><span class="plain">) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">ph</span><span class="plain">-</span><span class="element">>type_data.as_inline.invoked_inline_not_as_call</span><span class="plain">;</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Phrases::TypeData::make_inline is used in 22/ph (<a href="22-ph.html#SP6_3">§6.3</a>).</p>
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<p class="endnote">The function Phrases::TypeData::invoked_inline is used in 22/cs (<a href="22-cs.html#SP10_7">§10.7</a>), 22/tp (<a href="22-tp.html#SP8">§8</a>), 25/ci (<a href="25-ci.html#SP3_1_1_1">§3.1.1.1</a>, <a href="25-ci.html#SP4_1">§4.1</a>).</p>
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<p class="inwebparagraph"><a id="SP27"></a><b>§27. </b></p>
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<pre class="display">
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::is_a_let_assignment</span><span class="plain">(</span><span class="reserved">phrase</span><span class="plain"> *</span><span class="identifier">ph</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">ph</span><span class="plain">-</span><span class="element">>type_data.as_inline.let_phrase</span><span class="plain"> == </span><span class="constant">ASSIGNMENT_LET_PHRASE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::is_a_let_equation</span><span class="plain">(</span><span class="reserved">phrase</span><span class="plain"> *</span><span class="identifier">ph</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">ph</span><span class="plain">-</span><span class="element">>type_data.as_inline.let_phrase</span><span class="plain"> == </span><span class="constant">EQUATION_LET_PHRASE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::arithmetic_operation</span><span class="plain">(</span><span class="reserved">phrase</span><span class="plain"> *</span><span class="identifier">ph</span><span class="plain">) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">ph</span><span class="plain">-</span><span class="element">>type_data.as_inline.arithmetical_operation</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::is_arithmetic_phrase</span><span class="plain">(</span><span class="reserved">phrase</span><span class="plain"> *</span><span class="identifier">ph</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="functiontext">Phrases::TypeData::arithmetic_operation</span><span class="plain">(</span><span class="identifier">ph</span><span class="plain">) >= 0) &&</span>
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<span class="plain">(</span><span class="functiontext">Phrases::TypeData::arithmetic_operation</span><span class="plain">(</span><span class="identifier">ph</span><span class="plain">) < </span><span class="identifier">NO_OPERATIONS</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::is_assignment_phrase</span><span class="plain">(</span><span class="reserved">phrase</span><span class="plain"> *</span><span class="identifier">ph</span><span class="plain">) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">ph</span><span class="plain">-</span><span class="element">>type_data.as_inline.assignment_phrase</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="identifier">wchar_t</span><span class="plain"> *</span><span class="functiontext">Phrases::TypeData::only_in</span><span class="plain">(</span><span class="reserved">phrase</span><span class="plain"> *</span><span class="identifier">ph</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">ph</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">ph</span><span class="plain">-</span><span class="element">>type_data.as_inline.only_in_loop</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::block_follows</span><span class="plain">(</span><span class="reserved">phrase</span><span class="plain"> *</span><span class="identifier">ph</span><span class="plain">) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">ph</span><span class="plain">-</span><span class="element">>type_data.as_inline.block_follows</span><span class="plain">;</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Phrases::TypeData::is_a_let_assignment is used in 14/ds2 (<a href="14-ds2.html#SP11_9_1_1_3_1">§11.9.1.1.3.1</a>, <a href="14-ds2.html#SP11_9_1_1_3_1_1">§11.9.1.1.3.1.1</a>, <a href="14-ds2.html#SP14">§14</a>, <a href="14-ds2.html#SP15_1">§15.1</a>).</p>
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<p class="endnote">The function Phrases::TypeData::is_a_let_equation is used in 25/pi (<a href="25-pi.html#SP5_2">§5.2</a>).</p>
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<p class="endnote">The function Phrases::TypeData::arithmetic_operation is used in 14/ds2 (<a href="14-ds2.html#SP11_9_1_1_2">§11.9.1.1.2</a>, <a href="14-ds2.html#SP11_9_1_1_2_2">§11.9.1.1.2.2</a>), 20/eq (<a href="20-eq.html#SP41_3">§41.3</a>), 22/cs (<a href="22-cs.html#SP10_6">§10.6</a>), 25/cii (<a href="25-cii.html#SP3_5_7">§3.5.7</a>).</p>
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<p class="endnote">The function Phrases::TypeData::is_arithmetic_phrase is used in 14/ds2 (<a href="14-ds2.html#SP11_9_1_1_2">§11.9.1.1.2</a>, <a href="14-ds2.html#SP11_9_1_1_3">§11.9.1.1.3</a>).</p>
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<p class="endnote">The function Phrases::TypeData::is_assignment_phrase is used in 14/ds2 (<a href="14-ds2.html#SP11_9_1_1_5">§11.9.1.1.5</a>).</p>
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<p class="endnote">The function Phrases::TypeData::only_in is used in 14/ds2 (<a href="14-ds2.html#SP11_9_1_1_9">§11.9.1.1.9</a>).</p>
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<p class="endnote">The function Phrases::TypeData::block_follows is used in 25/cii (<a href="25-cii.html#SP1">§1</a>, <a href="25-cii.html#SP1_2_1">§1.2.1</a>, <a href="25-cii.html#SP3_5_1_1">§3.5.1.1</a>).</p>
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<p class="inwebparagraph"><a id="SP28"></a><b>§28. Return value polymorphism. </b>Inform has two sorts of polymorphism — that is, there are two ways in which
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the kinds of phrases can vary. One is by means of kind variables, the other
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is for arithmetic operations such as "plus" or "times": where the range of
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|
kinds which can go in is quite large, and the kind which comes out is then
|
|
determined on dimensional grounds. (A number times a length is another
|
|
length, but a number plus a length is an error, and so on.)
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</p>
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<pre class="display">
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::return_decided_dimensionally</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>manner_of_return</span><span class="plain"> == </span><span class="constant">DECIDES_VALUE_MOR</span><span class="plain">) &&</span>
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|
<span class="plain">(</span><span class="identifier">phtd</span><span class="plain">-</span><span class="element">>as_inline.arithmetical_operation</span><span class="plain"> >= 0)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="plain">}</span>
|
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Phrases::TypeData::return_decided_dimensionally is used in 14/rv (<a href="14-rv.html#SP23_7">§23.7</a>).</p>
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<p class="inwebparagraph"><a id="SP29"></a><b>§29. Tweaking phrase ordering. </b>Phrases marked for use only within a particular control structure, such as
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"otherwise" within "if", automatically precede all other phrases. The idea
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is that these are keywords whose effect is so powerful that we don't want
|
|
any chance of ambiguities arising due to unwise phrase definitions in the
|
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source text.
|
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</p>
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|
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<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Phrases::TypeData::inline_type_data_comparison</span><span class="plain">(</span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd1</span><span class="plain">, </span><span class="reserved">ph_type_data</span><span class="plain"> *</span><span class="identifier">phtd2</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>as_inline.only_in_loop</span><span class="plain">) && (</span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>as_inline.only_in_loop</span><span class="plain"> == </span><span class="identifier">FALSE</span><span class="plain">))</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="constant">BEFORE_PH</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">phtd2</span><span class="plain">-</span><span class="element">>as_inline.only_in_loop</span><span class="plain">) && (</span><span class="identifier">phtd1</span><span class="plain">-</span><span class="element">>as_inline.only_in_loop</span><span class="plain"> == </span><span class="identifier">FALSE</span><span class="plain">))</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="constant">AFTER_PH</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="constant">EQUAL_PH</span><span class="plain">;</span>
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<span class="plain">}</span>
|
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Phrases::TypeData::inline_type_data_comparison is used in <a href="#SP21_1">§21.1</a>.</p>
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<ul class="toc"><li><a href="22-prcd.html">Back to 'Phrase Runtime Context Data'</a></li><li><a href="22-dptd.html">Continue with 'Describing Phrase Type Data'</a></li></ul><hr class="tocbar">
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