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<!--Weave of 'Phrases as Values' 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">Inform7</a></li><li><a href="index.html">runtime</a></li><li><a href="index.html#4">Chapter 4: Compilation Utilities</a></li><li><b>Phrases as Values</b></li></ul></div>
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<p class="purpose">To provide the names of phrases as first-class values.</p>
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b>So much for setting up constant phrases. Now we come to compilation, and
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a surprise. It might be expected that a constant phrase compiles simply to
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an I6 routine name, but no: it compiles to a small array called a "closure".
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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">Phrases::Constants::compile</span><span class="plain-syntax">(</span><span class="identifier-syntax">constant_phrase</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cphr</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">id_body</span><span class="plain-syntax"> *</span><span class="identifier-syntax">idb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ToPhraseFamily::body_of_constant</span><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</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">idb</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"cannot reconstruct phrase from cphr"</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><a href="4-icd.html#SP6" class="function-link"><span class="function-syntax">IDCompilation::compiled_inline</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">idb</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><a href="4-pr.html#SP3" class="function-link"><span class="function-syntax">PhraseRequests::make_request</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">idb</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">ToPhraseFamily::kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">EMPTY_WORDING</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-cls.html#SP1" class="function-link"><span class="function-syntax">Phrases::Constants::iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</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">Phrases::Constants::iname</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">Phrases::Constants::iname</span></span>:<br/><a href="4-cls.html#SP2_1">§2.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">constant_phrase</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cphr</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">cphr</span><span class="plain-syntax">-></span><span class="identifier-syntax">cphr_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">id_body</span><span class="plain-syntax"> *</span><span class="identifier-syntax">idb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ToPhraseFamily::body_of_constant</span><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</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">idb</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"cannot reconstruct phrase from cphr"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">package_request</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::package_within</span></a><span class="plain-syntax">(</span><span class="constant-syntax">CLOSURES_HAP</span><span class="plain-syntax">, </span><span class="identifier-syntax">idb</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">requests_package</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">cphr</span><span class="plain-syntax">-></span><span class="identifier-syntax">cphr_iname</span><span class="plain-syntax"> = </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::make_iname_in</span></a><span class="plain-syntax">(</span><span class="constant-syntax">CLOSURE_DATA_HL</span><span class="plain-syntax">, </span><span class="identifier-syntax">P</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">cphr</span><span class="plain-syntax">-></span><span class="identifier-syntax">cphr_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="SP2" class="paragraph-anchor"></a><b>§2. </b>And this is where those arrays are 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">Phrases::Constants::compile_closures</span><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">constant_phrase</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cphr</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</span><span class="plain-syntax">, </span><span class="identifier-syntax">constant_phrase</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">id_body</span><span class="plain-syntax"> *</span><span class="identifier-syntax">idb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ToPhraseFamily::body_of_constant</span><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</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">idb</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"cannot reconstruct phrase from cphr"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">ToPhraseFamily::kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-cls.html#SP2_1" class="named-paragraph-link"><span class="named-paragraph">Compile the closure array for this constant phrase</span><span class="named-paragraph-number">2.1</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="SP2_1" class="paragraph-anchor"></a><b>§2.1. </b>The closure array consists of three words: the strong kind ID, the address
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of the routine, and the text of the name. (The latter enables us to print
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phrase values efficiently.) Note that we make a compilation request for the
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phrase in order to make sure somebody has actually compiled it: this is in
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case the phrase occurs as a constant but is never explicitly invoked.
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Compile the closure array for this constant phrase</span><span class="named-paragraph-number">2.1</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">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">iname</span><span class="plain-syntax"> = </span><a href="4-cls.html#SP1" class="function-link"><span class="function-syntax">Phrases::Constants::iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</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-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::named_array_begin</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="4-rsfk.html#SP15" class="function-link"><span class="function-syntax">RTKinds::emit_strong_id</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</span><span class="plain-syntax">-></span><span class="identifier-syntax">cphr_kind</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">RS</span><span class="plain-syntax"> = </span><a href="4-pr.html#SP4" class="function-link"><span class="function-syntax">PhraseRequests::make_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">idb</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">ToPhraseFamily::kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><a href="2-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::array_iname_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">RS</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">name</span><span class="plain-syntax">, </span><span class="string-syntax">"%W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">Nouns::nominative_singular</span><span class="plain-syntax">(</span><span class="identifier-syntax">cphr</span><span class="plain-syntax">-></span><span class="element-syntax">name</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><a href="2-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::array_text_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">name</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">name</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><a href="2-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::array_end</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">save</span><span class="plain-syntax">);</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-cls.html#SP2">§2</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b>Now we come to something trickier. We want default values for kinds of phrases,
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because otherwise we can't have variables holding phrases unless they are
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always initialised explicitly, and so on. Clearly the default value for a
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phrase to nothing is one that does nothing, and for a phrase to some kind K
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is one that returns the default value of kind K. For example, the default
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value of
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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"> phrase (text, time) -> number</span>
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</pre>
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<p class="commentary">is the function which takes any pair of a text and a time, does nothing with
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them, and always returns 0. But this means we need to actually compile such
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routines. Since there are in principle an infinite number of distinct phrase
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kinds, we will only compile them for the phrase kinds which arise during
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compilation.
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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">Phrases::Constants::compile_default_closure</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">Phrases::Constants::compile_default_closure</span></span>:<br/>Runtime Support for Kinds - <a href="4-rsfk.html#SP19_2">§19.2</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">closure_identifier</span><span class="plain-syntax">, </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">package_request</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Kinds::Behaviour::package</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rname</span><span class="plain-syntax"> = </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::make_iname_in</span></a><span class="plain-syntax">(</span><span class="constant-syntax">DEFAULT_CLOSURE_FN_HL</span><span class="plain-syntax">, </span><span class="identifier-syntax">P</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-cls.html#SP3_2" class="named-paragraph-link"><span class="named-paragraph">Compile the default routine</span><span class="named-paragraph-number">3.2</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-cls.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Compile the default closure</span><span class="named-paragraph-number">3.1</span></a></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_1" class="paragraph-anchor"></a><b>§3.1. </b>This must have exactly the same three-word form as the closure arrays
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made above.
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Compile the default closure</span><span class="named-paragraph-number">3.1</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">packaging_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax"> = </span><a href="2-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::named_array_begin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">closure_identifier</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="4-rsfk.html#SP15" class="function-link"><span class="function-syntax">RTKinds::emit_strong_id</span></a><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><a href="2-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::array_iname_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">rname</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">DVT</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">DVT</span><span class="plain-syntax">, </span><span class="string-syntax">"default value of "</span><span class="plain-syntax">); </span><span class="identifier-syntax">Kinds::Textual::write</span><span class="plain-syntax">(</span><span class="identifier-syntax">DVT</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><a href="2-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::array_text_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">DVT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">DVT</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><a href="2-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::array_end</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">save</span><span class="plain-syntax">);</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-cls.html#SP3">§3</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3_2" class="paragraph-anchor"></a><b>§3.2. </b>And here is the function that refers to:
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Compile the default routine</span><span class="named-paragraph-number">3.2</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">packaging_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax"> = </span><a href="4-rtn.html#SP2" class="function-link"><span class="function-syntax">Routines::begin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">rname</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LocalVariables::add_named_call</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="string-syntax">"a"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LocalVariables::add_named_call</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="string-syntax">"b"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LocalVariables::add_named_call</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="string-syntax">"c"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LocalVariables::add_named_call</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="string-syntax">"d"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LocalVariables::add_named_call</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="string-syntax">"e"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LocalVariables::add_named_call</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="string-syntax">"f"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LocalVariables::add_named_call</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="string-syntax">"g"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LocalVariables::add_named_call</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="string-syntax">"h"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">result</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">Kinds::binary_construction_material</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, &</span><span class="identifier-syntax">result</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::get_construct</span><span class="plain-syntax">(</span><span class="identifier-syntax">result</span><span class="plain-syntax">) != </span><span class="identifier-syntax">CON_NIL</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::inv_primitive</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">RETURN_BIP</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::down</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><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::uses_pointer_values</span><span class="plain-syntax">(</span><span class="identifier-syntax">result</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">iname</span><span class="plain-syntax"> = </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::find</span></a><span class="plain-syntax">(</span><span class="constant-syntax">BLKVALUECREATE_HL</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::inv_call_iname</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">iname</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::down</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">());</span>
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<span class="plain-syntax"> </span><a href="4-rsfk.html#SP15" class="function-link"><span class="function-syntax">RTKinds::emit_strong_id_as_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">result</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::up</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">());</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</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><a href="4-rsfk.html#SP5" class="function-link"><span class="function-syntax">RTKinds::emit_default_value_as_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">result</span><span class="plain-syntax">, </span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</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="identifier-syntax">Produce::val</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">K_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">LITERAL_IVAL</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>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::up</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">());</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><a href="4-rtn.html#SP5" class="function-link"><span class="function-syntax">Routines::end</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">save</span><span class="plain-syntax">);</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-cls.html#SP3">§3</a>.</li></ul>
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