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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Inform7 Modules</a></li><li><a href="index.html">core</a></li><li><a href="index.html#25">Chapter 25: Compilation</a></li><li><b>Parse Invocations</b></li></ul></div>
<p class="purpose">To register phrases with the excerpt parser, and to provide the excerpt parser with help in putting invocations together.</p>
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<ul class="toc"><li><a href="25-pi.html#SP1">&#167;1. Parsing of phrases</a></li><li><a href="25-pi.html#SP4">&#167;4. Parsing invocations</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1"></a><b>&#167;1. Parsing of phrases. </b>The control structures of Inform are defined in the Standard Rules. Before
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the coming of Python-style indentation to Inform, blocks of code were closed
with "end..." phrases: "end if", "end repeat" and "end while". In fact these
are still valid, for the benefit of partially sighted users, and the
following construction makes the end phrase for a given control structure.
</p>
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<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;end-phrase-construction&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">end</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-ap.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP2"></a><b>&#167;2. </b>This section aims to take text like
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</p>
<blockquote>
<p>add 17 to the list of small primes;</p>
</blockquote>
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<p class="commentary">which the excerpt parser can see is a possible usage of a phrase such as
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</p>
<blockquote>
<p>To add (new entry - K) to (L - list of values of kind K), if absent: ...</p>
</blockquote>
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<p class="commentary">and to help the excerpt parser by putting together an invocation.
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</p>
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<p class="commentary">To even make that possible, though, we must first register each "To..."
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phrase definition with the excerpt parser:
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Phrases::Parser::register_excerpt</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::Parser::register_excerpt</span></span>:<br/>To Phrases - <a href="22-tp.html#SP6">&#167;6</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">phrase</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ph</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">ph_type_data</span><span class="plain-syntax"> *</span><span class="identifier-syntax">phtd</span><span class="plain-syntax"> = &amp;(</span><span class="identifier-syntax">ph</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">type_data</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">Wordings::empty</span><span class="plain-syntax">(</span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">registration_text</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">PHRASE_REGISTRATION</span><span class="plain-syntax">, </span><span class="string-syntax">"Register phrase &lt;%W&gt; with type:\n$h"</span><span class="plain-syntax">, </span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">registration_text</span><span class="plain-syntax">, </span><span class="identifier-syntax">phtd</span><span class="plain-syntax">);</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="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">registration_text</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">manner_of_return</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">DECIDES_NOTHING_MOR:</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="22-ptd.html#SP22" class="function-link"><span class="function-syntax">Phrases::TypeData::is_a_say_phrase</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ph</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><a href="25-pi.html#SP3" class="function-link"><span class="function-syntax">Phrases::Parser::register_phrasal</span></a><span class="plain-syntax">(</span><span class="constant-syntax">SAY_PHRASE_MC</span><span class="plain-syntax">, </span><span class="identifier-syntax">ph</span><span class="plain-syntax">, </span><span class="identifier-syntax">Wordings::trim_first_word</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">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">as_inline</span><span class="plain-syntax">.</span><span class="element-syntax">block_follows</span><span class="plain-syntax"> != </span><span class="constant-syntax">NO_BLOCK_FOLLOWS</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><a href="25-pi.html#SP3" class="function-link"><span class="function-syntax">Phrases::Parser::register_phrasal</span></a><span class="plain-syntax">(</span><span class="constant-syntax">VOID_PHRASE_MC</span><span class="plain-syntax">, </span><span class="identifier-syntax">ph</span><span class="plain-syntax">, </span><span class="identifier-syntax">Wordings::trim_last_word</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">else</span>
<span class="plain-syntax"> </span><a href="25-pi.html#SP3" class="function-link"><span class="function-syntax">Phrases::Parser::register_phrasal</span></a><span class="plain-syntax">(</span><span class="constant-syntax">VOID_PHRASE_MC</span><span class="plain-syntax">, </span><span class="identifier-syntax">ph</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">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="identifier-syntax">DECIDES_CONDITION_MOR:</span><span class="plain-syntax"> </span><a href="25-pi.html#SP3" class="function-link"><span class="function-syntax">Phrases::Parser::register_phrasal</span></a><span class="plain-syntax">(</span><span class="constant-syntax">COND_PHRASE_MC</span><span class="plain-syntax">, </span><span class="identifier-syntax">ph</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</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="identifier-syntax">DECIDES_VALUE_MOR:</span><span class="plain-syntax"> </span><a href="25-pi.html#SP3" class="function-link"><span class="function-syntax">Phrases::Parser::register_phrasal</span></a><span class="plain-syntax">(</span><span class="constant-syntax">VALUE_PHRASE_MC</span><span class="plain-syntax">, </span><span class="identifier-syntax">ph</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP3"></a><b>&#167;3. </b>At this point, then, we've identified the meaning code (MC) to register
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the phrase under, and must make the actual registration.
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">phrase</span><span class="plain-syntax"> *</span><span class="identifier-syntax">last_phrase_where_rp_problemed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Phrases::Parser::register_phrasal</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::Parser::register_phrasal</span></span>:<br/><a href="25-pi.html#SP2">&#167;2</a>, <a href="25-pi.html#SP3_2_1">&#167;3.2.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">unsigned</span><span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">phrase_mc</span><span class="plain-syntax">, </span><span class="reserved-syntax">phrase</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ph</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="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">PHRASE_REGISTRATION</span><span class="plain-syntax">, </span><span class="string-syntax">"Register phrasal on &lt;%W&gt;: $u\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="22-ptd.html#SP13" class="function-link"><span class="function-syntax">Phrases::TypeData::kind</span></a><span class="plain-syntax">(&amp;(</span><span class="identifier-syntax">ph</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">type_data</span><span class="plain-syntax">)));</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Vet phrase text for suitability</span><span class="named-paragraph-number">3.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP3_2" class="named-paragraph-link"><span class="named-paragraph">Look for slash-divided alternative phrasings and recurse to register all variations</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="identifier-syntax">ExcerptMeanings::register</span><span class="plain-syntax">(</span><span class="identifier-syntax">phrase_mc</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">STORE_POINTER_phrase</span><span class="plain-syntax">(</span><span class="identifier-syntax">ph</span><span class="plain-syntax">));</span>
<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP3_1"></a><b>&#167;3.1. </b>Some sanity checks first:
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Vet phrase text for suitability</span><span class="named-paragraph-number">3.1</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">fixed_words</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</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">phrase_mc</span><span class="plain-syntax"> == </span><span class="constant-syntax">SAY_PHRASE_MC</span><span class="plain-syntax">) </span><span class="identifier-syntax">fixed_words</span><span class="plain-syntax">++;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_WORDING</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</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="identifier-syntax">Lexer::word</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) == </span><span class="identifier-syntax">OPENBRACKET_V</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Lexer::word</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) == </span><span class="identifier-syntax">CLOSEBRACKET_V</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">fixed_words</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">Vocabulary::test_flags</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">TEXT_MC</span><span class="plain-syntax">+</span><span class="identifier-syntax">TEXTWITHSUBS_MC</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP3_1_1" class="named-paragraph-link"><span class="named-paragraph">Issue problem for quoted text in phrase wording</span><span class="named-paragraph-number">3.1.1</span></a></span><span class="plain-syntax">;</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">i</span><span class="plain-syntax">&lt;</span><span class="identifier-syntax">Wordings::last_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) &amp;&amp; (</span><span class="identifier-syntax">Lexer::word</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) == </span><span class="identifier-syntax">CLOSEBRACKET_V</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">Lexer::word</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">+1) == </span><span class="identifier-syntax">OPENBRACKET_V</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP3_1_2" class="named-paragraph-link"><span class="named-paragraph">Issue problem for brackets jammed up against each other</span><span class="named-paragraph-number">3.1.2</span></a></span><span class="plain-syntax">;</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">fixed_words</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="25-pi.html#SP3_1_3" class="named-paragraph-link"><span class="named-paragraph">Issue problem for phrase consisting only of tokens</span><span class="named-paragraph-number">3.1.3</span></a></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="25-pi.html#SP3">&#167;3</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_1_1"></a><b>&#167;3.1.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Issue problem for quoted text in phrase wording</span><span class="named-paragraph-number">3.1.1</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ph</span><span class="plain-syntax"> != </span><span class="identifier-syntax">last_phrase_where_rp_problemed</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::Issue::sentence_problem</span><span class="plain-syntax">(</span><a href="1-wtc.html#SP5" class="function-link"><span class="function-syntax">Task::syntax_tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_QuotedInPhrase</span><span class="plain-syntax">),</span>
<span class="plain-syntax"> </span><span class="string-syntax">"phrases can't be defined with quoted text as part of the fixed wording"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="string-syntax">"so something like 'To go \"voluntarily\" to jail: ...' is not allowed."</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">last_phrase_where_rp_problemed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ph</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>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="25-pi.html#SP3_1">&#167;3.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_1_2"></a><b>&#167;3.1.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Issue problem for brackets jammed up against each other</span><span class="named-paragraph-number">3.1.2</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ph</span><span class="plain-syntax"> != </span><span class="identifier-syntax">last_phrase_where_rp_problemed</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::Issue::sentence_problem</span><span class="plain-syntax">(</span><a href="1-wtc.html#SP5" class="function-link"><span class="function-syntax">Task::syntax_tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_AdjacentTokens</span><span class="plain-syntax">),</span>
<span class="plain-syntax"> </span><span class="string-syntax">"phrases can't be defined so that they have two bracketed varying elements "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"immediately next to each other"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="string-syntax">"but instead need at least one fixed word in between. Thus 'To combine "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"(X - a number) (Y - a number)' is not allowed, but 'To combine (X - a "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"number) with (Y - a number)' works because of the 'with' dividing the "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"bracketed terms X and Y."</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">last_phrase_where_rp_problemed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ph</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>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="25-pi.html#SP3_1">&#167;3.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_1_3"></a><b>&#167;3.1.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Issue problem for phrase consisting only of tokens</span><span class="named-paragraph-number">3.1.3</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ph</span><span class="plain-syntax"> != </span><span class="identifier-syntax">last_phrase_where_rp_problemed</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::Issue::sentence_problem</span><span class="plain-syntax">(</span><a href="1-wtc.html#SP5" class="function-link"><span class="function-syntax">Task::syntax_tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_MustBeOneWord</span><span class="plain-syntax">),</span>
<span class="plain-syntax"> </span><span class="string-syntax">"a 'To...' phrase must contain at least one fixed word"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="string-syntax">"that is, one word other than the bracketed variables. So a declaration "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"like 'To (N - number): ...' is not allowed."</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">last_phrase_where_rp_problemed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ph</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>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="25-pi.html#SP3_1">&#167;3.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_2"></a><b>&#167;3.2. </b>The remaining work is to look out for this sort of thing:
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</p>
<blockquote>
<p>To rearrange the deckchairs/loungers on (S - a ship): ...</p>
</blockquote>
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<p class="commentary">where the slash indicates an alternative wording:
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Look for slash-divided alternative phrasings and recurse to register all variations</span><span class="named-paragraph-number">3.2</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_WORDING</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</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="identifier-syntax">Lexer::word</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) == </span><span class="identifier-syntax">OPENBRACKET_V</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Lexer::word</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) == </span><span class="identifier-syntax">CLOSEBRACKET_V</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> *</span><span class="identifier-syntax">p</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">phrase_mc</span><span class="plain-syntax"> == </span><span class="constant-syntax">SAY_PHRASE_MC</span><span class="plain-syntax">) </span><span class="identifier-syntax">p</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Lexer::word_raw_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">p</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Lexer::word_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">p</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">]; </span><span class="identifier-syntax">j</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">j</span><span class="plain-syntax">&gt;0) &amp;&amp; (</span><span class="identifier-syntax">p</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">-1] != </span><span class="character-syntax">'/'</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">p</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] == </span><span class="character-syntax">'/'</span><span class="plain-syntax">) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">p</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">+1]) &amp;&amp; (</span><span class="identifier-syntax">p</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">+1] != </span><span class="character-syntax">'/'</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP3_2_1" class="named-paragraph-link"><span class="named-paragraph">This word is divided by a forward slash at the j-position in word i</span><span class="named-paragraph-number">3.2.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</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="25-pi.html#SP3">&#167;3</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_2_1"></a><b>&#167;3.2.1. </b>What we do is to reconstruct this as two different registrations:
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</p>
<blockquote>
<p>To rearrange the deckchairs on (S - a ship): ...</p>
</blockquote>
<blockquote>
<p>To rearrange the loungers on (S - a ship): ...</p>
</blockquote>
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<p class="commentary">and then recursively call ourselves to handle each individual one. We'll
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call the left and right hand sides of "deckchairs/loungers" the A and
B forms.
</p>
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<p class="commentary">Note than a phrase with many slashed words will register a frightening
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number of possibilities &mdash; for example,
</p>
<blockquote>
<p>To meld/blend/merge (O - object) onto/into/amongst/with (P - object) quickly/rapidly/pronto: ...</p>
</blockquote>
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<p class="commentary">will register 36 excerpts. But the hashing in the excerpts parser shouldn't
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make the result too slow.
</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This word is divided by a forward slash at the j-position in word i</span><span class="named-paragraph-number">3.2.1</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">a_form</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">b_form</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP3_2_1_1" class="named-paragraph-link"><span class="named-paragraph">Splice up the A and B forms of the slashed word</span><span class="named-paragraph-number">3.2.1.1</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="25-pi.html#SP3_2_1_2" class="named-paragraph-link"><span class="named-paragraph">Make sure the A form isn't the S-word</span><span class="named-paragraph-number">3.2.1.2</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">AW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">, </span><span class="identifier-syntax">BW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP3_2_1_3" class="named-paragraph-link"><span class="named-paragraph">Splice up the A and B forms of the whole phrase wording</span><span class="named-paragraph-number">3.2.1.3</span></a></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">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">AW</span><span class="plain-syntax">)) </span><a href="25-pi.html#SP3" class="function-link"><span class="function-syntax">Phrases::Parser::register_phrasal</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">phrase_mc</span><span class="plain-syntax">, </span><span class="identifier-syntax">ph</span><span class="plain-syntax">, </span><span class="identifier-syntax">AW</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">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">BW</span><span class="plain-syntax">)) </span><a href="25-pi.html#SP3" class="function-link"><span class="function-syntax">Phrases::Parser::register_phrasal</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">phrase_mc</span><span class="plain-syntax">, </span><span class="identifier-syntax">ph</span><span class="plain-syntax">, </span><span class="identifier-syntax">BW</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">a_form</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">b_form</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</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="25-pi.html#SP3_2">&#167;3.2</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_2_1_1"></a><b>&#167;3.2.1.1. </b>The double-dash means "omit this word altogether".
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Splice up the A and B forms of the slashed word</span><span class="named-paragraph-number">3.2.1.1</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">k</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">k</span><span class="plain-syntax">&lt;</span><span class="identifier-syntax">j</span><span class="plain-syntax">; </span><span class="identifier-syntax">k</span><span class="plain-syntax">++) </span><span class="identifier-syntax">PUT_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">a_form</span><span class="plain-syntax">, </span><span class="identifier-syntax">p</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">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">k</span><span class="plain-syntax">=</span><span class="identifier-syntax">j</span><span class="plain-syntax">+1; </span><span class="identifier-syntax">p</span><span class="plain-syntax">[</span><span class="identifier-syntax">k</span><span class="plain-syntax">]; </span><span class="identifier-syntax">k</span><span class="plain-syntax">++) </span><span class="identifier-syntax">PUT_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">b_form</span><span class="plain-syntax">, </span><span class="identifier-syntax">p</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">Str::eq_wide_string</span><span class="plain-syntax">(</span><span class="identifier-syntax">a_form</span><span class="plain-syntax">, </span><span class="identifier-syntax">L</span><span class="string-syntax">"--"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">Str::clear</span><span class="plain-syntax">(</span><span class="identifier-syntax">a_form</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">Str::eq_wide_string</span><span class="plain-syntax">(</span><span class="identifier-syntax">b_form</span><span class="plain-syntax">, </span><span class="identifier-syntax">L</span><span class="string-syntax">"--"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">Str::clear</span><span class="plain-syntax">(</span><span class="identifier-syntax">b_form</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="25-pi.html#SP3_2_1">&#167;3.2.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_2_1_2"></a><b>&#167;3.2.1.2. </b>If we don't check this then hybrids like
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</p>
<blockquote>
<p>To say/adjust (X - an object): ...</p>
</blockquote>
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<p class="commentary">will confuse two different sorts of phrase. ("Say" is allowed after the first
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word, though.)
</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make sure the A form isn't the S-word</span><span class="named-paragraph-number">3.2.1.2</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">Str::eq_wide_string</span><span class="plain-syntax">(</span><span class="identifier-syntax">a_form</span><span class="plain-syntax">, </span><span class="identifier-syntax">L</span><span class="string-syntax">"say"</span><span class="plain-syntax">)) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Wordings::first_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) &amp;&amp; (</span><span class="identifier-syntax">phrase_mc</span><span class="plain-syntax"> != </span><span class="constant-syntax">SAY_PHRASE_MC</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">ph</span><span class="plain-syntax"> != </span><span class="identifier-syntax">last_phrase_where_rp_problemed</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::Issue::sentence_problem</span><span class="plain-syntax">(</span><a href="1-wtc.html#SP5" class="function-link"><span class="function-syntax">Task::syntax_tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_SaySlashed</span><span class="plain-syntax">),</span>
<span class="plain-syntax"> </span><span class="string-syntax">"'say' is not allowed as the first word of a phrase"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="string-syntax">"even when presented as one of a number of slashed alternatives. "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"(This is because 'say' is reserved for creating text substitutions.)"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">last_phrase_where_rp_problemed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ph</span><span class="plain-syntax">;</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="25-pi.html#SP3_2_1">&#167;3.2.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_2_1_3"></a><b>&#167;3.2.1.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Splice up the A and B forms of the whole phrase wording</span><span class="named-paragraph-number">3.2.1.3</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">feed_t</span><span class="plain-syntax"> </span><span class="identifier-syntax">id</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Feeds::begin</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">i</span><span class="plain-syntax"> &gt; </span><span class="identifier-syntax">Wordings::first_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) </span><span class="identifier-syntax">Feeds::feed_wording</span><span class="plain-syntax">(</span><span class="identifier-syntax">Wordings::up_to</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">-1));</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">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">a_form</span><span class="plain-syntax">) &gt; </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">Feeds::feed_text_expanding_strings</span><span class="plain-syntax">(</span><span class="identifier-syntax">a_form</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">i</span><span class="plain-syntax"> &lt; </span><span class="identifier-syntax">Wordings::last_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) </span><span class="identifier-syntax">Feeds::feed_wording</span><span class="plain-syntax">(</span><span class="identifier-syntax">Wordings::from</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">+1));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">AW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Feeds::end</span><span class="plain-syntax">(</span><span class="identifier-syntax">id</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">id</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Feeds::begin</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">i</span><span class="plain-syntax"> &gt; </span><span class="identifier-syntax">Wordings::first_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) </span><span class="identifier-syntax">Feeds::feed_wording</span><span class="plain-syntax">(</span><span class="identifier-syntax">Wordings::up_to</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">-1));</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">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">b_form</span><span class="plain-syntax">) &gt; </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">Feeds::feed_text_expanding_strings</span><span class="plain-syntax">(</span><span class="identifier-syntax">b_form</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">i</span><span class="plain-syntax"> &lt; </span><span class="identifier-syntax">Wordings::last_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) </span><span class="identifier-syntax">Feeds::feed_wording</span><span class="plain-syntax">(</span><span class="identifier-syntax">Wordings::from</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">+1));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">BW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Feeds::end</span><span class="plain-syntax">(</span><span class="identifier-syntax">id</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="25-pi.html#SP3_2_1">&#167;3.2.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP4"></a><b>&#167;4. Parsing invocations. </b>So, then, at this point the excerpt parser has identified a phrase which it
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thinks may be being invoked in some text. For example, it may have read:
</p>
<blockquote>
<p>advance the pawn by 2;</p>
</blockquote>
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<p class="commentary">and guessed that this is an invocation of
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</p>
<blockquote>
<p>To advance (the piece - a chess piece) by (N - a number): ...</p>
</blockquote>
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<p class="commentary">An S-node will have been constructed for the possibility that this is correct,
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identifying the text of any phrase options used (here there are none) and the
text of the tokens, "the pawn" and "2".
</p>
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<p class="commentary">We now take over, and construct an invocation structure on this basis.
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Note that there's no reason to suppose this will pass type-checking:
we would be just as happy with
</p>
<blockquote>
<p>advance "frangipane" by 10:21 PM;</p>
</blockquote>
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<p class="commentary">because our only aim here is to document the possibility for later checking.
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</p>
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<p class="commentary">The invocation is marked as "unproven", meaning that the typechecker hasn't
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yet vetted it, unless it's a fixed wording with nothing to check:
</p>
<blockquote>
<p>To shed my skin: ...</p>
</blockquote>
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<p class="commentary">because then our purely textual match is sufficient.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="function-syntax">Phrases::Parser::parse_against</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">Phrases::Parser::parse_against</span></span>:<br/>Conditions and Phrases - <a href="10-cap.html#SP12_1">&#167;12.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">phrase</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ph</span><span class="plain-syntax">, </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">p</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">p</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">"parse against null subtree"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">WW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">OW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">token_text</span><span class="plain-syntax">[15]; </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_tokens</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP4_1" class="named-paragraph-link"><span class="named-paragraph">Extract all this text from the subtree</span><span class="named-paragraph-number">4.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inv</span><span class="plain-syntax"> = </span><a href="25-in.html#SP9" class="function-link"><span class="function-syntax">Invocations::new</span></a><span class="plain-syntax">();</span>
<span class="plain-syntax"> </span><a href="25-in.html#SP12" class="function-link"><span class="function-syntax">Invocations::set_word_range</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">WW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Node::set_phrase_invoked</span><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">ph</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="14-ds2.html#SP25" class="function-link"><span class="function-syntax">Dash::suspend_validation</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">ph_type_data</span><span class="plain-syntax"> *</span><span class="identifier-syntax">phtd</span><span class="plain-syntax"> = &amp;(</span><span class="identifier-syntax">ph</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">type_data</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">i</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax">&lt;</span><span class="identifier-syntax">no_tokens</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP4_2" class="named-paragraph-link"><span class="named-paragraph">Parse the ith token into the invocation</span><span class="named-paragraph-number">4.2</span></a></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">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">OW</span><span class="plain-syntax">)) </span><a href="25-in.html#SP19" class="function-link"><span class="function-syntax">Invocations::set_phrase_options</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">OW</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="14-ds2.html#SP25" class="function-link"><span class="function-syntax">Dash::suspend_validation</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">MATCHING</span><span class="plain-syntax">, </span><span class="string-syntax">"Parse against to invocation: $e\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">inv</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">inv</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP4_1"></a><b>&#167;4.1. </b>We will never actually hit the 15 tokens limit, because it's impossible to
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register phrases with more than that number of tokens anyway.
</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Extract all this text from the subtree</span><span class="named-paragraph-number">4.1</span></span><span class="comment-syntax"> =</span>
</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">WW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_text</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="identifier-syntax">p</span><span class="plain-syntax"> = </span><span class="identifier-syntax">p</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">down</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">p</span><span class="plain-syntax"> &amp;&amp; (</span><span class="identifier-syntax">Annotations::read_int</span><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">, </span><span class="constant-syntax">is_phrase_option_ANNOT</span><span class="plain-syntax">))) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">OW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_text</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="identifier-syntax">p</span><span class="plain-syntax"> = </span><span class="identifier-syntax">p</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; ((</span><span class="identifier-syntax">p</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">no_tokens</span><span class="plain-syntax">&lt;15)); </span><span class="identifier-syntax">p</span><span class="plain-syntax"> = </span><span class="identifier-syntax">p</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</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">Node::get_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">) == </span><span class="identifier-syntax">UNKNOWN_NT</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">token_text</span><span class="plain-syntax">[</span><span class="identifier-syntax">no_tokens</span><span class="plain-syntax">++] = </span><span class="identifier-syntax">Node::get_text</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="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"Unexpected production in phrase args"</span><span class="plain-syntax">);</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">no_tokens</span><span class="plain-syntax"> &gt; </span><span class="constant-syntax">MAX_TOKENS_PER_PHRASE</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::Fatal::issue</span><span class="plain-syntax">(</span><span class="string-syntax">"MAX_TOKENS_PER_PHRASE exceeded"</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="25-pi.html#SP4">&#167;4</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP4_2"></a><b>&#167;4.2. </b>As can be seen, the way we parse the token text depends on the context,
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that is, depends on what we're expecting to find. (This is why the excerpt
parser needs our help in the first place.)
</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Parse the ith token into the invocation</span><span class="named-paragraph-number">4.2</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">to_match</span><span class="plain-syntax"> = </span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">to_match</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">X</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Articles::remove_the</span><span class="plain-syntax">(</span><span class="identifier-syntax">token_text</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</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">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">construct</span><span class="plain-syntax"> == </span><span class="constant-syntax">NEW_LOCAL_PT_CONSTRUCT</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">to_match</span><span class="plain-syntax"> = </span><a href="14-sp.html#SP1" class="function-link"><span class="function-syntax">Specifications::from_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K_value</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">NEW_LOCAL_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">token_kind</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">construct</span><span class="plain-syntax"> == </span><span class="constant-syntax">EXISTING_LOCAL_PT_CONSTRUCT</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">to_match</span><span class="plain-syntax"> = </span><a href="14-sp.html#SP1" class="function-link"><span class="function-syntax">Specifications::from_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K_value</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">LVALUE_LOCAL_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">token_kind</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">construct</span><span class="plain-syntax"> == </span><span class="constant-syntax">STORAGE_PT_CONSTRUCT</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">LVALUE_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">Node::get_kind_of_value</span><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><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><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">construct</span><span class="plain-syntax"> == </span><span class="constant-syntax">TABLE_REFERENCE_PT_CONSTRUCT</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">LVALUE_TR_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">Node::get_kind_of_value</span><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><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><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">construct</span><span class="plain-syntax"> == </span><span class="constant-syntax">CONDITION_PT_CONSTRUCT</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">CONDITION_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</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">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">phtd</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">construct</span><span class="plain-syntax"> == </span><span class="constant-syntax">VOID_PT_CONSTRUCT</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">VOID_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</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">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="14-sp.html#SP2" class="function-link"><span class="function-syntax">Specifications::is_kind_like</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">RVALUE_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><a href="14-sp.html#SP1" class="function-link"><span class="function-syntax">Specifications::to_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="14-sp.html#SP3" class="function-link"><span class="function-syntax">Specifications::is_description</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">MATCHING_RVALUE_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><a href="14-sp.html#SP1" class="function-link"><span class="function-syntax">Specifications::to_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><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><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Node::is</span><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">, </span><span class="constant-syntax">CONSTANT_NT</span><span class="plain-syntax">))</span>
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<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">SPECIFIC_RVALUE_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><a href="14-sp.html#SP1" class="function-link"><span class="function-syntax">Specifications::to_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::make_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">RVALUE_CONTEXT_NT</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">); </span><span class="comment-syntax"> doesn't actually happen</span>
<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::set_token_to_be_parsed_against</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">to_match</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">as_parsed</span><span class="plain-syntax"> = </span><a href="14-sp.html#SP8" class="function-link"><span class="function-syntax">Specifications::new_UNKNOWN</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::set_token_as_parsed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">as_parsed</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="25-pi.html#SP4">&#167;4</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5"></a><b>&#167;5. </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">Phrases::Parser::parse_within_inv</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">Phrases::Parser::parse_within_inv</span></span>:<br/>Dash - <a href="14-ds2.html#SP11_9_1_1">&#167;11.9.1.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inv</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><a href="10-aots.html#SP14" class="function-link"><span class="function-syntax">ExParser::warn_expression_cache</span></a><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="25-in.html#SP17" class="function-link"><span class="function-syntax">Invocations::get_no_tokens</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax"> &lt; </span><span class="identifier-syntax">N</span><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">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">to_match</span><span class="plain-syntax"> = </span><a href="25-in.html#SP17" class="function-link"><span class="function-syntax">Invocations::get_token_to_be_parsed_against</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</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">cons</span><span class="plain-syntax"> = -1;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">phrase</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ph</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_phrase_invoked</span><span class="plain-syntax">(</span><span class="identifier-syntax">inv</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">ph</span><span class="plain-syntax">) </span><span class="identifier-syntax">cons</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ph</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">type_data</span><span class="plain-syntax">.</span><span class="element-syntax">token_sequence</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</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">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">cons</span><span class="plain-syntax"> == </span><span class="constant-syntax">CONDITION_PT_CONSTRUCT</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">cons</span><span class="plain-syntax"> == </span><span class="constant-syntax">VOID_PT_CONSTRUCT</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">as_parsed</span><span class="plain-syntax"> = </span><a href="25-in.html#SP17" class="function-link"><span class="function-syntax">Invocations::get_token_as_parsed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">XW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">as_parsed</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> #</span><span class="identifier-syntax">ifdef</span><span class="plain-syntax"> </span><span class="identifier-syntax">IF_MODULE</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">pto</span><span class="plain-syntax"> = </span><span class="identifier-syntax">permit_trying_omission</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><a href="14-sp.html#SP2" class="function-link"><span class="function-syntax">Specifications::is_kind_like</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">)) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">Kinds::Compare::eq</span><span class="plain-syntax">(</span><a href="14-sp.html#SP1" class="function-link"><span class="function-syntax">Specifications::to_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">), </span><span class="identifier-syntax">K_stored_action</span><span class="plain-syntax">))) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">permit_trying_omission</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP5_1" class="named-paragraph-link"><span class="named-paragraph">Parse the action in a try phrase</span><span class="named-paragraph-number">5.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">permit_trying_omission</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> #</span><span class="identifier-syntax">endif</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP5_2" class="named-paragraph-link"><span class="named-paragraph">Parse any other token</span><span class="named-paragraph-number">5.2</span></a></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">IF_MODULE</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">permit_trying_omission</span><span class="plain-syntax"> = </span><span class="identifier-syntax">pto</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> #</span><span class="identifier-syntax">endif</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Node::set_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">as_parsed</span><span class="plain-syntax">, </span><span class="identifier-syntax">XW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="25-in.html#SP16" class="function-link"><span class="function-syntax">Invocations::set_token_as_parsed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">as_parsed</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP5_1"></a><b>&#167;5.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Parse the action in a try phrase</span><span class="named-paragraph-number">5.1</span></span><span class="comment-syntax"> =</span>
</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="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="function-syntax">&lt;action-pattern&gt;</span><span class="plain-syntax">(</span><span class="identifier-syntax">XW</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">as_parsed</span><span class="plain-syntax"> = </span><a href="14-cn.html#SP10" class="function-link"><span class="function-syntax">Conditions::new_TEST_ACTION</span></a><span class="plain-syntax">(</span><span class="function-syntax">&lt;&lt;rp&gt;&gt;</span><span class="plain-syntax">, </span><span class="identifier-syntax">XW</span><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>
<span class="plain-syntax"> </span><span class="identifier-syntax">permit_trying_omission</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="25-pi.html#SP5_2" class="named-paragraph-link"><span class="named-paragraph">Parse any other token</span><span class="named-paragraph-number">5.2</span></a></span><span class="plain-syntax">;</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="25-pi.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_2"></a><b>&#167;5.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Parse any other token</span><span class="named-paragraph-number">5.2</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">save_probable_noun_phrase_context</span><span class="plain-syntax"> = </span><span class="identifier-syntax">probable_noun_phrase_context</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">save_let_equation_mode</span><span class="plain-syntax"> = </span><span class="identifier-syntax">let_equation_mode</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">probable_noun_phrase_context</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">if</span><span class="plain-syntax"> (</span><a href="14-sp.html#SP2" class="function-link"><span class="function-syntax">Specifications::is_kind_like</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">probable_noun_phrase_context</span><span class="plain-syntax"> =</span>
<span class="plain-syntax"> </span><a href="14-sp.html#SP1" class="function-link"><span class="function-syntax">Specifications::to_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">let_equation_mode</span><span class="plain-syntax"> = </span><a href="22-ptd.html#SP27" class="function-link"><span class="function-syntax">Phrases::TypeData::is_a_let_equation</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ph</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">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">; </span><span class="comment-syntax"> redundant assignment to keep </span><span class="extract"><span class="extract-syntax">gcc</span></span><span class="comment-syntax"> happy</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="14-sp.html#SP3" class="function-link"><span class="function-syntax">Specifications::is_description</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to_match</span><span class="plain-syntax">))</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="function-syntax">&lt;s-value&gt;</span><span class="plain-syntax">(</span><span class="identifier-syntax">XW</span><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><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">cons</span><span class="plain-syntax"> == </span><span class="constant-syntax">CONDITION_PT_CONSTRUCT</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="function-syntax">&lt;s-condition&gt;</span><span class="plain-syntax">(</span><span class="identifier-syntax">XW</span><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><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">cons</span><span class="plain-syntax"> == </span><span class="constant-syntax">VOID_PT_CONSTRUCT</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="function-syntax">&lt;s-command&gt;</span><span class="plain-syntax">(</span><span class="identifier-syntax">XW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="function-syntax">&lt;s-value&gt;</span><span class="plain-syntax">(</span><span class="identifier-syntax">XW</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">t</span><span class="plain-syntax">) </span><span class="identifier-syntax">as_parsed</span><span class="plain-syntax"> = </span><span class="function-syntax">&lt;&lt;rp&gt;&gt;</span><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><span class="identifier-syntax">as_parsed</span><span class="plain-syntax"> = </span><a href="14-sp.html#SP8" class="function-link"><span class="function-syntax">Specifications::new_UNKNOWN</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">XW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">MATCHING</span><span class="plain-syntax">, </span><span class="string-syntax">"(%d/%d) Expected kind $u: parsed token %W (cons %d) to $P\n"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">+1, </span><span class="identifier-syntax">N</span><span class="plain-syntax">, </span><span class="identifier-syntax">probable_noun_phrase_context</span><span class="plain-syntax">, </span><span class="identifier-syntax">XW</span><span class="plain-syntax">, </span><span class="identifier-syntax">cons</span><span class="plain-syntax">, </span><span class="identifier-syntax">as_parsed</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">probable_noun_phrase_context</span><span class="plain-syntax"> = </span><span class="identifier-syntax">save_probable_noun_phrase_context</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">let_equation_mode</span><span class="plain-syntax"> = </span><span class="identifier-syntax">save_let_equation_mode</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="25-pi.html#SP5">&#167;5</a>, <a href="25-pi.html#SP5_1">&#167;5.1</a>.</li></ul>
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