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<!--Weave of 'Familiar Kinds' generated by Inweb-->
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<div class="breadcrumbs">
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Services</a></li><li><a href="index.html">kinds</a></li><li><a href="index.html#2">Chapter 2: Kinds</a></li><li><b>Familiar Kinds</b></li></ul></div>
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<p class="purpose">To recognise certain kind names as familiar built-in ones.</p>
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<ul class="toc"><li><a href="2-fk.html#SP10">§10. Kind names in the I6 template</a></li><li><a href="2-fk.html#SP11">§11. Kind names in source text</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1"></a><b>§1. </b>In the Inform source code, we're clearly going to need to refer to some
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of these kinds. The compiler provides support for, say, parsing times of
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day, or for indexing scenes, which go beyond the generic facilities it
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provides for kinds created in source text. We adopt two naming conventions:
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</p>
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<ul class="items"><li>(i) Kinds are written as <span class="extract"><span class="extract-syntax">K_source_text_name</span></span>, that is, <span class="extract"><span class="extract-syntax">K_</span></span> followed by
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the name of the kind in I7 source text, with spaces made into underscores.
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For instance, <span class="extract"><span class="extract-syntax">K_number</span></span>. These are all <span class="extract"><span class="extract-syntax">kind *</span></span> global variables
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which are initially <span class="extract"><span class="extract-syntax">NULL</span></span>, but which, once set, are never changed.
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</li><li>(ii) Constructors are likewise written as <span class="extract"><span class="extract-syntax">CON_source_text_name</span></span> if they can
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be created in source text; or by <span class="extract"><span class="extract-syntax">CON_TEMPLATE_NAME</span></span>, that is, <span class="extract"><span class="extract-syntax">CON_</span></span>
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followed by the constructor's identifier as given in the I6 template file
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which created it (but with the <span class="extract"><span class="extract-syntax">_TY</span></span> suffix removed) if not. For instance,
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<span class="extract"><span class="extract-syntax">CON_list_of</span></span> means the constructor able to make, e.g., "list of texts";
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<span class="extract"><span class="extract-syntax">CON_TUPLE_ENTRY</span></span> refers to the constructor created by the <span class="extract"><span class="extract-syntax">TUPLE_ENTRY_TY</span></span>
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block in the <span class="extract"><span class="extract-syntax">Load-Core.i6t</span></span> template file. These are all <span class="extract"><span class="extract-syntax">kind_constructor
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</span></span>*<span class="extract"><span class="extract-syntax"> global variables which are initially </span></span>NULL<span class="extract"><span class="extract-syntax">, but which, once set, are
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</span></span>never changed.
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</li></ul>
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<p class="commentary">We will now define all of the <span class="extract"><span class="extract-syntax">K_...</span></span> and <span class="extract"><span class="extract-syntax">CON_...</span></span> used by the core of
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Inform. (Others are created and used within specific plugins.)
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</p>
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<p class="commentary firstcommentary"><a id="SP2"></a><b>§2. </b>We begin with some base kinds which are "kinds of kinds" useful in
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generic programming.
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</p>
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<p class="commentary"><span class="extract"><span class="extract-syntax">K_value</span></span> is a superhero, or perhaps a supervillain: it matches values of
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every kind. Not being a kind in its own right, it can't be the kind of a
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variable — which is just as well, since no use of such a variable could
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ever be safe.
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</p>
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<p class="commentary">The finer distinctions <span class="extract"><span class="extract-syntax">K_word_value</span></span> and <span class="extract"><span class="extract-syntax">K_pointer_value</span></span> are used to
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divide all run-time data into two very different storage implementations:
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</p>
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<ul class="items"><li>(a) those where instances are stored as word-value data, where a single I6 value
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holds the whole thing, like "number";
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</li><li>(b) those where instances are stored as pointers to larger blocks of data on the
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heap, like "stored action".
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</li></ul>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_value</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_word_value</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_pointer_value</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_sayable_value</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP3"></a><b>§3. </b>The following refer to values subject to arithmetic operations (drawn with a
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little calculator icon in the Kinds index), and those which are implemented as
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enumerations of named constants. (This includes, e.g., scenes and figure names
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but not objects, whose run-time storage is not a simple numerical enumeration,
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or truth states, which are stored as 0 and 1 not 1 and 2. In particular, it
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isn't the same thing as having a finite range in the Kinds index.)
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_arithmetic_value</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_real_arithmetic_value</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="comment-syntax"> those using real, not integer, arithmetic</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_enumerated_value</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP4"></a><b>§4. </b>Next, the two constructors used to punctuate tuples, that is, collections
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\((K_1, K_2, ..., K_n)\) of kinds of value. <span class="extract"><span class="extract-syntax">CON_NIL</span></span> represents the empty
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tuple, where \(n=0\); while <span class="extract"><span class="extract-syntax">CON_TUPLE_ENTRY</span></span> behaves like a kind constructor
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with arity 2, its two bases being the first item and the rest, respectively.
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Thus we store \((A, B, C)\) as
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> CON_TUPLE_ENTRY(A, CON_TUPLE_ENTRY(B, CON_TUPLE_ENTRY(C, CON_NIL)))</span>
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</pre>
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<p class="commentary">This traditional LISP-like device enables us to store tuples of arbitrary
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size without need for any constructor of arity greater than 2.
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</p>
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<ul class="items"><li>(a) Inform has no "nil" or "void" kind visible to the writer of source
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text, though it does occasionally use a kind it calls <span class="extract"><span class="extract-syntax">K_nil</span></span> internally
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to represent this idea — for instance for a rulebook producing nothing;
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<span class="extract"><span class="extract-syntax">K_nil</span></span> is the kind constructed by <span class="extract"><span class="extract-syntax">CON_NIL</span></span>.
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</li><li>(b) Inform does allow combinations, but they're identified by trees headed
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by the constructor <span class="extract"><span class="extract-syntax">CON_combination</span></span>, which then uses punctuation in its own
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subtree. You might guess that an ordered pair of a text and a time would be
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represented by the <span class="extract"><span class="extract-syntax">CON_TUPLE_ENTRY</span></span> constructor on its own, but it isn't.
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</li></ul>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_nil</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_void</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_NIL</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_VOID</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_TUPLE_ENTRY</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP5"></a><b>§5. </b>It was mentioned above that two special constructors carry additional
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annotations with them. The first of these is <span class="extract"><span class="extract-syntax">CON_INTERMEDIATE</span></span>, used to
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represent kinds which are brought into being through uncompleted arithmetic
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operations: see "Dimensions.w" for a full discussion. Such a node in a
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kind tree might represent "area divided by time squared", say, and it must
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be annotated to show exactly which intermediate kind is meant.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_INTERMEDIATE</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP6"></a><b>§6. </b>While that doesn't significantly change the kinds system, the second special
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constructor certainly does. This is <span class="extract"><span class="extract-syntax">CON_KIND_VARIABLE</span></span>, annotated to show
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which of the 26 kind variables it represents in any given situation. These
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variables are, in effect, wildcards; each is marked with a "kind of kind"
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as its range of possible values. (Thus a typical use of this constructor
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might result in a kind node labelled as L, which can be any kind matching
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"arithmetic value".)
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_KIND_VARIABLE</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP7"></a><b>§7. </b>So much for the exotica: back onto familiar ground for anyone who uses
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Inform. Some standard kinds:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_action_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_equation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_grammatical_gender</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_natural_language</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_number</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_object</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_real_number</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_response</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_snippet</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_stored_action</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_table</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_text</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_truth_state</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_unicode_character</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_use_option</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_verb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP8"></a><b>§8. </b>And here are two more standard kinds, but which most Inform uses don't
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realise are there, because they are omitted from the Kinds index:
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</p>
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<ul class="items"><li>(a) <span class="extract"><span class="extract-syntax">K_rulebook_outcome</span></span>. Rulebooks end in success, failure, no outcome, or
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possibly one of a range of named alternative outcomes. These all share a
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single namespace, and the names in question share a single kind of value.
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It's not a very elegant system, and we really don't want people storing
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these in variables; we want them to be used only as part of the process of
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receiving the outcome back. So although there's no technical reason why this
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kind shouldn't be used for storage, it's hidden from the user.
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</li><li>(b) <span class="extract"><span class="extract-syntax">K_understanding</span></span> is used to hold the result of a grammar token. An actual
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constant value specification of this kind stores a <span class="extract"><span class="extract-syntax">grammar_verb *</span></span> pointer.
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It's an untidy internal device which may well be removed later.
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</li></ul>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_rulebook_outcome</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K_understanding</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP9"></a><b>§9. </b>Finally, the constructors used by Inform authors:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_list_of</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_description</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_relation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_rule</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_rulebook</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_activity</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_phrase</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_property</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_table_column</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_combination</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> *</span><span class="identifier-syntax">CON_variable</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP10"></a><b>§10. Kind names in the I6 template. </b>We defined some "constant" kinds and constructors above, to provide
|
|
values like <span class="extract"><span class="extract-syntax">K_number</span></span> for use in this C source code. We will also want to
|
|
refer to these kinds in the Inform 6 source code for the template, where
|
|
they will have identifiers such as <span class="extract"><span class="extract-syntax">NUMBER_TY</span></span>. (If anything it's the other
|
|
way round, since the template creates these kinds at run-time, using the
|
|
kind interpreter — of which, more later.)
|
|
</p>
|
|
|
|
<p class="commentary">So we need a way of pairing up names in these two source codes, and here
|
|
it is. There is no need for speed here.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="identifier-syntax">text_of_I6_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">pointer_to_I7_structure</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">sn</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">Str::eq_narrow_string</span><span class="plain-syntax">(</span><span class="identifier-syntax">sn</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_of_I6_name</span><span class="plain-syntax">))) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">pointer_to_I7_structure</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">kind_constructor</span><span class="plain-syntax"> **</span><span class="function-syntax">FamiliarKinds::known_con</span><button class="popup" onclick="togglePopup('usagePopup1')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup1">Usage of <span class="code-font"><span class="function-syntax">FamiliarKinds::known_con</span></span>:<br/>Kind Constructors - <a href="2-kc2.html#SP6">§6</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"ACTIVITY_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_activity</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"COMBINATION_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_combination</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"DESCRIPTION_OF_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_description</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"INTERMEDIATE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_INTERMEDIATE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"KIND_VARIABLE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_KIND_VARIABLE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"LIST_OF_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_list_of</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"PHRASE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_phrase</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"NIL_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_NIL</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"VOID_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_VOID</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"PROPERTY_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_property</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"RELATION_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_relation</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"RULE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_rule</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"RULEBOOK_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_rulebook</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"TABLE_COLUMN_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_table_column</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"TUPLE_ENTRY_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_TUPLE_ENTRY</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"VARIABLE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">CON_variable</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">kind</span><span class="plain-syntax"> **</span><span class="function-syntax">FamiliarKinds::known_kind</span><button class="popup" onclick="togglePopup('usagePopup2')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup2">Usage of <span class="code-font"><span class="function-syntax">FamiliarKinds::known_kind</span></span>:<br/>Kind Constructors - <a href="2-kc2.html#SP6">§6</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"ARITHMETIC_VALUE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_arithmetic_value</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"ENUMERATED_VALUE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_enumerated_value</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"EQUATION_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_equation</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"TEXT_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_text</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"NUMBER_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_number</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"OBJECT_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_object</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"POINTER_VALUE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_pointer_value</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"REAL_ARITHMETIC_VALUE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_real_arithmetic_value</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"REAL_NUMBER_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_real_number</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"RESPONSE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_response</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"RULEBOOK_OUTCOME_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_rulebook_outcome</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"SAYABLE_VALUE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_sayable_value</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"SNIPPET_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_snippet</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"TABLE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_table</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"TRUTH_STATE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_truth_state</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"UNDERSTANDING_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_understanding</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"UNICODE_CHARACTER_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_unicode_character</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"USE_OPTION_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_use_option</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"VALUE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_value</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"VERB_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_verb</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"WORD_VALUE_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_word_value</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"NIL_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_nil</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">IDENTIFIERS_CORRESPOND</span><span class="plain-syntax">(</span><span class="string-syntax">"VOID_TY"</span><span class="plain-syntax">, &</span><span class="identifier-syntax">K_void</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">FamiliarKinds::is_known</span><button class="popup" onclick="togglePopup('usagePopup3')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup3">Usage of <span class="code-font"><span class="function-syntax">FamiliarKinds::is_known</span></span>:<br/>Kind Commands - <a href="4-kc.html#SP13_1">§13.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-fk.html#SP10" class="function-link"><span class="function-syntax">FamiliarKinds::known_con</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sn</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-fk.html#SP10" class="function-link"><span class="function-syntax">FamiliarKinds::known_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sn</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP11"></a><b>§11. Kind names in source text. </b>Inform creates the "natural language" kind in source text, not by loading it
|
|
from a file, but we still need to refer to it in the compiler. Similarly for
|
|
"grammatical gender". The others here are only
|
|
</p>
|
|
|
|
<pre class="Preform-displayed-code all-displayed-code code-font">
|
|
<span class="Preform-function-syntax"><notable-linguistic-kinds></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">natural</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">language</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">grammatical</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">gender</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">grammatical</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">tense</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">narrative</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">viewpoint</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">grammatical</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">case</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This is <a href="../words-module/4-ap.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP12"></a><b>§12. </b></p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">FamiliarKinds::notice_new_kind</span><button class="popup" onclick="togglePopup('usagePopup4')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup4">Usage of <span class="code-font"><span class="function-syntax">FamiliarKinds::notice_new_kind</span></span>:<br/>Kinds - <a href="2-knd.html#SP17">§17</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="function-syntax"><notable-linguistic-kinds></span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-kc2.html#SP12" class="function-link"><span class="function-syntax">Kinds::Constructors::mark_as_linguistic</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">-></span><span class="element-syntax">construct</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="function-syntax"><<r>></span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">: </span><span class="identifier-syntax">K_natural_language</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> #</span><span class="identifier-syntax">ifdef</span><span class="plain-syntax"> </span><span class="identifier-syntax">NOTIFY_NATURAL_LANGUAGE_KINDS_CALLBACK</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">NOTIFY_NATURAL_LANGUAGE_KINDS_CALLBACK</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> #</span><span class="identifier-syntax">endif</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">: </span><span class="identifier-syntax">K_grammatical_gender</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax">}</span>
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</pre>
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