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<!--Weave of 'List Literals' 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="../inform7n.html">Inform7</a></li><li><a href="index.html">runtime</a></li><li><a href="index.html#4">Chapter 4: Enclosed Resources</a></li><li><b>List Literals</b></li></ul></div>
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<p class="purpose">Each enclosure contains the literal lists needed by its functions.</p>
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<ul class="toc"><li><a href="4-ll.html#SP1">§1. Runtime representation</a></li><li><a href="4-ll.html#SP3">§3. Default values for list kinds</a></li><li><a href="4-ll.html#SP4">§4. Literals</a></li><li><a href="4-ll.html#SP6">§6. The instance list for a kind</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. Runtime representation. </b>Literal lists arise from source text such 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"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">Q</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> { </span><span class="constant-syntax">60</span><span class="plain-syntax">, </span><span class="constant-syntax">168</span><span class="plain-syntax"> };</span>
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</pre>
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<p class="commentary">The data to hold <span class="extract"><span class="extract-syntax">{ 60, 168 }</span></span> has to be stored somehow. As with all
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kinds for which values cannot be stored in a single word, we use a double
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pointer:
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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"> small block: large block:</span>
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<span class="plain-syntax"> Q ----------------> pointer ----------------> block value header</span>
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<span class="plain-syntax"> 0 strong kind ID for entries</span>
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<span class="plain-syntax"> number of entries</span>
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<span class="plain-syntax"> the entries</span>
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</pre>
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<p class="commentary">So in this particular example, the result would be:
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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"> small block: large block:</span>
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<span class="plain-syntax"> Q ----------------> pointer ----------------> block value header</span>
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<span class="plain-syntax"> 0 NUMBER_TY</span>
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<span class="plain-syntax"> 2</span>
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<span class="plain-syntax"> 60</span>
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<span class="plain-syntax"> 168</span>
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</pre>
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<p class="commentary">So the small block always occupies 2 words, the second being initially 0 and
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used at runtime; the large block can be any size we need. The runtime code has
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elaborate ways to extend or contract dynamic lists, but these of course are
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constants, so we simply make the large blocks exactly the right size.
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</p>
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<p class="commentary">We make the large block first:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">packaging_state</span><span class="plain-syntax"> </span><span class="function-syntax">ListLiterals::begin_large_block</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">ListLiterals::begin_large_block</span></span>:<br/><a href="4-ll.html#SP3">§3</a>, <a href="4-ll.html#SP5_1">§5.1</a>, <a href="4-ll.html#SP7">§7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">iname</span><span class="plain-syntax">, </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">list_kind</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_entries</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">packaging_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax"> = </span><a href="2-ea.html#SP2" class="function-link"><span class="function-syntax">EmitArrays::begin_word</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">iname</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_value</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-th.html#SP6" class="function-link"><span class="function-syntax">TheHeap::emit_block_value_header</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">list_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">, </span><span class="identifier-syntax">no_entries</span><span class="plain-syntax"> + </span><span class="constant-syntax">2</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="5-ki.html#SP6" class="function-link"><span class="function-syntax">RTKindIDs::strong_ID_array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Kinds::unary_construction_material</span><span class="plain-syntax">(</span><span class="identifier-syntax">list_kind</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><a href="2-ea.html#SP4" class="function-link"><span class="function-syntax">EmitArrays::numeric_entry</span></a><span class="plain-syntax">((</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax">) </span><span class="identifier-syntax">no_entries</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">ListLiterals::end_large_block</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">ListLiterals::end_large_block</span></span>:<br/><a href="4-ll.html#SP3">§3</a>, <a href="4-ll.html#SP5_1">§5.1</a>, <a href="4-ll.html#SP7">§7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">packaging_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><a href="2-ea.html#SP5" class="function-link"><span class="function-syntax">EmitArrays::end</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">save</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>And then make the small block pointing to it:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="function-syntax">ListLiterals::small_block</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">ListLiterals::small_block</span></span>:<br/><a href="4-ll.html#SP4">§4</a>, <a href="4-ll.html#SP7">§7</a><br/>Default Values - <a href="2-dv.html#SP2_1">§2.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">large_block</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><a href="4-enc.html#SP2" class="function-link"><span class="function-syntax">Enclosures::new_small_block_for_constant</span></a><span class="plain-syntax">();</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">packaging_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax"> = </span><a href="2-ea.html#SP2" class="function-link"><span class="function-syntax">EmitArrays::begin_unchecked</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">N</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-ea.html#SP4" class="function-link"><span class="function-syntax">EmitArrays::iname_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">large_block</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-ea.html#SP4" class="function-link"><span class="function-syntax">EmitArrays::numeric_entry</span></a><span class="plain-syntax">(0);</span>
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<span class="plain-syntax"> </span><a href="2-ea.html#SP5" class="function-link"><span class="function-syntax">EmitArrays::end</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">save</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. Default values for list kinds. </b>The default list is the empty list, but note from the above representation
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that the empty list of numbers (say) is different from the empty list of texts:
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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"> small block: large block:</span>
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<span class="plain-syntax"> ----> pointer ----------------> block value header</span>
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<span class="plain-syntax"> NUMBER_TY</span>
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<span class="plain-syntax"> 0</span>
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<span class="plain-syntax"> small block: large block:</span>
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<span class="plain-syntax"> ----> pointer ----------------> block value header</span>
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<span class="plain-syntax"> TEXT_TY</span>
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<span class="plain-syntax"> 0</span>
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</pre>
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<p class="commentary">So each different kind K needs its own large block for making the default value
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of "list of K": see <a href="5-ki.html#SP9" class="internal">RTKindIDs::compile_structures</a>. This block is easily made:
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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">void</span><span class="plain-syntax"> </span><span class="function-syntax">ListLiterals::default_large_block</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">ListLiterals::default_large_block</span></span>:<br/>Default Values - <a href="2-dv.html#SP2_1">§2.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">iname</span><span class="plain-syntax">, </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">list_kind</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">packaging_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax"> = </span><a href="4-ll.html#SP1" class="function-link"><span class="function-syntax">ListLiterals::begin_large_block</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">iname</span><span class="plain-syntax">, </span><span class="identifier-syntax">list_kind</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="4-ll.html#SP1" class="function-link"><span class="function-syntax">ListLiterals::end_large_block</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">save</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. Literals. </b>To return to the example:
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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"> </span><span class="identifier-syntax">let</span><span class="plain-syntax"> </span><span class="identifier-syntax">Q</span><span class="plain-syntax"> </span><span class="identifier-syntax">be</span><span class="plain-syntax"> { </span><span class="constant-syntax">60</span><span class="plain-syntax">, </span><span class="constant-syntax">168</span><span class="plain-syntax"> };</span>
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</pre>
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<p class="commentary">Each list literal like <span class="extract"><span class="extract-syntax">{ 60, 168 }</span></span> in imperative code results in a <span class="extract"><span class="extract-syntax">literal_list</span></span>
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object, and here we return its 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="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="function-syntax">ListLiterals::compile_literal_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">literal_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ll</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Lists::kind_of_ll</span><span class="plain-syntax">(</span><span class="identifier-syntax">ll</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-ll.html#SP2" class="function-link"><span class="function-syntax">ListLiterals::small_block</span></a><span class="plain-syntax">(</span><a href="4-ll.html#SP4" class="function-link"><span class="function-syntax">ListLiterals::large_block_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ll</span><span class="plain-syntax">));</span>
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<span class="plain-syntax">}</span>
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<span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="function-syntax">ListLiterals::large_block_iname</span><span class="plain-syntax">(</span><span class="identifier-syntax">literal_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ll</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">ll</span><span class="plain-syntax">-></span><span class="identifier-syntax">ll_iname</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">ll</span><span class="plain-syntax">-></span><span class="identifier-syntax">ll_iname</span><span class="plain-syntax"> = </span><a href="4-enc.html#SP1" class="function-link"><span class="function-syntax">Enclosures::new_iname</span></a><span class="plain-syntax">(</span><span class="constant-syntax">LITERALS_HAP</span><span class="plain-syntax">, </span><span class="constant-syntax">LIST_LITERAL_HL</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">desc</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::new</span><span class="plain-syntax">();</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">desc</span><span class="plain-syntax">, </span><span class="string-syntax">"list literal '%W'"</span><span class="plain-syntax">, </span><span class="identifier-syntax">ll</span><span class="plain-syntax">-></span><span class="identifier-syntax">unbraced_text</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Sequence::queue_at</span><span class="plain-syntax">(&</span><a href="4-ll.html#SP5" class="function-link"><span class="function-syntax">ListLiterals::compilation_agent</span></a><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">STORE_POINTER_literal_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">ll</span><span class="plain-syntax">), </span><span class="identifier-syntax">desc</span><span class="plain-syntax">, </span><span class="identifier-syntax">ll</span><span class="plain-syntax">-></span><span class="identifier-syntax">list_text</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ll</span><span class="plain-syntax">-></span><span class="identifier-syntax">ll_iname</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. </b>The large blocks are then compiled in due course by the following agent
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(see <a href="../core-module/1-htc.html" class="internal">How To Compile (in core)</a>):
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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">void</span><span class="plain-syntax"> </span><span class="function-syntax">ListLiterals::compilation_agent</span><button class="popup" onclick="togglePopup('usagePopup5')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup5">Usage of <span class="code-font"><span class="function-syntax">ListLiterals::compilation_agent</span></span>:<br/><a href="4-ll.html#SP4">§4</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">compilation_subtask</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">literal_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ll</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RETRIEVE_POINTER_literal_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="identifier-syntax">data</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">ll</span><span class="plain-syntax">-></span><span class="identifier-syntax">ll_iname</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Lists::kind_of_ll</span><span class="plain-syntax">(</span><span class="identifier-syntax">ll</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</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">problem_count</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="4-ll.html#SP5_1" class="named-paragraph-link"><span class="named-paragraph">Compile the large block for this literal</span><span class="named-paragraph-number">5.1</span></a></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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</pre>
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<p class="commentary firstcommentary"><a id="SP5_1" class="paragraph-anchor"></a><b>§5.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Compile the large block for this literal</span><span class="named-paragraph-number">5.1</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="identifier-syntax">llist_entry</span><span class="plain-syntax"> *</span><span class="identifier-syntax">lle</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">lle</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ll</span><span class="plain-syntax">-></span><span class="identifier-syntax">first_llist_entry</span><span class="plain-syntax">; </span><span class="identifier-syntax">lle</span><span class="plain-syntax">; </span><span class="identifier-syntax">lle</span><span class="plain-syntax"> = </span><span class="identifier-syntax">lle</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_llist_entry</span><span class="plain-syntax">) </span><span class="identifier-syntax">n</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">packaging_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax"> =</span>
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<span class="plain-syntax"> </span><a href="4-ll.html#SP1" class="function-link"><span class="function-syntax">ListLiterals::begin_large_block</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ll</span><span class="plain-syntax">-></span><span class="identifier-syntax">ll_iname</span><span class="plain-syntax">, </span><span class="identifier-syntax">Lists::kind_of_ll</span><span class="plain-syntax">(</span><span class="identifier-syntax">ll</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">), </span><span class="identifier-syntax">n</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">lle</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ll</span><span class="plain-syntax">-></span><span class="identifier-syntax">first_llist_entry</span><span class="plain-syntax">; </span><span class="identifier-syntax">lle</span><span class="plain-syntax">; </span><span class="identifier-syntax">lle</span><span class="plain-syntax"> = </span><span class="identifier-syntax">lle</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_llist_entry</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">CompileValues::to_array_entry_of_kind</span><span class="plain-syntax">(</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">lle</span><span class="plain-syntax">-></span><span class="identifier-syntax">llist_entry_value</span><span class="plain-syntax">, </span><span class="identifier-syntax">ll</span><span class="plain-syntax">-></span><span class="element-syntax">entry_kind</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="4-ll.html#SP1" class="function-link"><span class="function-syntax">ListLiterals::end_large_block</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">save</span><span class="plain-syntax">);</span>
|
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</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-ll.html#SP5">§5</a>.</li></ul>
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|
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>§6. The instance list for a kind. </b>For kinds of object and enumerations, Inform sometimes chooses to compile its
|
|
own literal list, even though this is not specified anywhere in the source text.
|
|
Not all kinds have these: obviously, there can be no instance list for <span class="extract"><span class="extract-syntax">K_real_number</span></span>.
|
|
The following returns -1 if <span class="extract"><span class="extract-syntax">K</span></span> is similarly unsuitable, or a non-negative value
|
|
for the number of instances it has:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">ListLiterals::extent_of_instance_list</span><button class="popup" onclick="togglePopup('usagePopup6')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup6">Usage of <span class="code-font"><span class="function-syntax">ListLiterals::extent_of_instance_list</span></span>:<br/><a href="4-ll.html#SP7">§7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Kinds::Behaviour::is_an_enumeration</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="5-kc.html#SP26" class="function-link"><span class="function-syntax">RTKindConstructors::enumeration_size</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Kinds::Behaviour::is_subkind_of_object</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Instances::count</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> -1;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>§7. </b>And the following then constructs the literal list, on demand:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="function-syntax">ListLiterals::get_instance_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><a href="4-ll.html#SP6" class="function-link"><span class="function-syntax">ListLiterals::extent_of_instance_list</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><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="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">large_block_iname</span><span class="plain-syntax"> = </span><a href="5-kc.html#SP14" class="function-link"><span class="function-syntax">RTKindConstructors::list_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Kinds::get_construct</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">large_block_iname</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">large_block_iname</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-hrr.html#SP12" class="function-link"><span class="function-syntax">Hierarchy::make_iname_in</span></a><span class="plain-syntax">(</span><span class="constant-syntax">INSTANCE_LIST_HL</span><span class="plain-syntax">, </span><a href="5-kc.html#SP2" class="function-link"><span class="function-syntax">RTKindConstructors::kind_package</span></a><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">packaging_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax"> = </span><a href="4-ll.html#SP1" class="function-link"><span class="function-syntax">ListLiterals::begin_large_block</span></a><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">large_block_iname</span><span class="plain-syntax">, </span><span class="identifier-syntax">Kinds::unary_con</span><span class="plain-syntax">(</span><span class="identifier-syntax">CON_list_of</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">), </span><span class="identifier-syntax">N</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Kinds::Behaviour::is_an_enumeration</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">)) </span><a href="5-kc.html#SP28" class="function-link"><span class="function-syntax">RTKindConstructors::make_enumeration_entries</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Kinds::Behaviour::is_subkind_of_object</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">)) </span><span class="named-paragraph-container code-font"><a href="4-ll.html#SP7_1" class="named-paragraph-link"><span class="named-paragraph">Compile entries for a kind of object</span><span class="named-paragraph-number">7.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-ll.html#SP1" class="function-link"><span class="function-syntax">ListLiterals::end_large_block</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">save</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="5-kc.html#SP14" class="function-link"><span class="function-syntax">RTKindConstructors::set_list_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Kinds::get_construct</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">), </span><span class="identifier-syntax">large_block_iname</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-ll.html#SP2" class="function-link"><span class="function-syntax">ListLiterals::small_block</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">large_block_iname</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP7_1" class="paragraph-anchor"></a><b>§7.1. </b>Note that the instances are given in the order preferred by <a href="2-ic.html" class="internal">Instance Counting</a>,
|
|
not in creation order, as a simple <span class="extract"><span class="extract-syntax">LOOP_OVER_INSTANCES</span></span> would have done.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Compile entries for a kind of object</span><span class="named-paragraph-number">7.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax"> = </span><a href="2-ic.html#SP7" class="function-link"><span class="function-syntax">InstanceCounting::next_in_IK_sequence</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">I</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ea.html#SP4" class="function-link"><span class="function-syntax">EmitArrays::iname_entry</span></a><span class="plain-syntax">(</span><a href="5-ins.html#SP1" class="function-link"><span class="function-syntax">RTInstances::value_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax"> = </span><a href="2-ic.html#SP7" class="function-link"><span class="function-syntax">InstanceCounting::next_in_IK_sequence</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-ll.html#SP7">§7</a>.</li></ul>
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