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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Natural Languages</title>
<link href="Breadcrumbs.css" rel="stylesheet" rev="stylesheet" type="text/css">
<meta name="viewport" content="width=device-width initial-scale=1">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Language" content="en-gb">
<link href="Contents.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="Progress.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="Navigation.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="Fonts.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="Base.css" rel="stylesheet" rev="stylesheet" type="text/css">
<script>
function togglePopup(material_id) {
var popup = document.getElementById(material_id);
popup.classList.toggle("show");
}
</script>
<link href="Popups.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="Colours.css" rel="stylesheet" rev="stylesheet" type="text/css">
</head>
<body class="commentary-font">
<nav role="navigation">
<h1><a href="../index.html">
<img src="../docs-src/Figures/Inform.png" height=72">
</a></h1>
<ul><li><a href="../compiler.html">compiler tools</a></li>
<li><a href="../other.html">other tools</a></li>
<li><a href="../extensions.html">extensions and kits</a></li>
<li><a href="../units.html">unit test tools</a></li>
</ul><h2>Compiler Webs</h2><ul>
<li><a href="../inbuild/index.html">inbuild</a></li>
<li><a href="../inform7/index.html">inform7</a></li>
<li><a href="../inter/index.html">inter</a></li>
</ul><h2>Inbuild Modules</h2><ul>
<li><a href="../supervisor-module/index.html">supervisor</a></li>
</ul><h2>Inform7 Modules</h2><ul>
<li><a href="index.html"><span class="selectedlink">core</span></a></li>
<li><a href="../inflections-module/index.html">inflections</a></li>
<li><a href="../linguistics-module/index.html">linguistics</a></li>
<li><a href="../kinds-module/index.html">kinds</a></li>
<li><a href="../if-module/index.html">if</a></li>
<li><a href="../multimedia-module/index.html">multimedia</a></li>
<li><a href="../problems-module/index.html">problems</a></li>
<li><a href="../index-module/index.html">index</a></li>
</ul><h2>Inter Modules</h2><ul>
<li><a href="../bytecode-module/index.html">bytecode</a></li>
<li><a href="../building-module/index.html">building</a></li>
<li><a href="../codegen-module/index.html">codegen</a></li>
</ul><h2>Shared Modules</h2><ul>
<li><a href="../arch-module/index.html">arch</a></li>
<li><a href="../syntax-module/index.html">syntax</a></li>
<li><a href="../words-module/index.html">words</a></li>
<li><a href="../html-module/index.html">html</a></li>
<li><a href="../../../inweb/docs/foundation-module/index.html">foundation</a></li>
</ul>
</nav>
<main role="main">
<!--Weave of 'Natural Languages' generated by Inweb-->
<div class="breadcrumbs">
<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#3">Chapter 3: Bridge to Words Module</a></li><li><b>Natural Languages</b></li></ul></div>
<p class="purpose">To manage definitions of natural languages, such as English or French, which may be used either to write Inform or to read the works it compiles.</p>
<ul class="toc"><li><a href="3-nl.html#SP1">&#167;1. Indexing</a></li><li><a href="3-nl.html#SP3">&#167;3. Parsing</a></li><li><a href="3-nl.html#SP4">&#167;4. The natural language kind</a></li><li><a href="3-nl.html#SP5">&#167;5. The adaptive person</a></li><li><a href="3-nl.html#SP6">&#167;6. Including Preform syntax</a></li></ul><hr class="tocbar">
<p class="commentary firstcommentary"><a id="SP1"></a><b>&#167;1. Indexing. </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">NaturalLanguages::produce_index</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">NaturalLanguages::produce_index</span></span>:<br/>How To Compile - <a href="1-htc.html#SP2_9">&#167;2.9</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inform_project</span><span class="plain-syntax"> *</span><span class="identifier-syntax">project</span><span class="plain-syntax"> = </span><a href="1-wtc.html#SP5" class="function-link"><span class="function-syntax">Task::project</span></a><span class="plain-syntax">();</span>
<span class="plain-syntax"> </span><a href="26-iti.html#SP1" class="function-link"><span class="function-syntax">I6T::interpret_indext</span></a><span class="plain-syntax">(</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Filenames::in</span><span class="plain-syntax">(</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Languages::path_to_bundle</span><span class="plain-syntax">(</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Projects::get_language_of_index</span><span class="plain-syntax">(</span><span class="identifier-syntax">project</span><span class="plain-syntax">)),</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Projects::index_structure</span><span class="plain-syntax">(</span><span class="identifier-syntax">project</span><span class="plain-syntax">)));</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP2"></a><b>&#167;2. </b></p>
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">NATURAL_LANGUAGES_PRESENT</span>
</pre>
<p class="commentary firstcommentary"><a id="SP3"></a><b>&#167;3. Parsing. </b>The following matches the English-language name of a language: for example,
"French". It will only make a match if Inform has successfully found a
bundle for that language during its initial scan.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax">&lt;</span><span class="identifier-syntax">natural</span><span class="plain-syntax">-</span><span class="identifier-syntax">language</span><span class="plain-syntax">&gt; </span><span class="identifier-syntax">internal</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inform_language</span><span class="plain-syntax"> *</span><span class="identifier-syntax">L</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">L</span><span class="plain-syntax">, </span><span class="identifier-syntax">inform_language</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::match</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">Wordings::first_word</span><span class="plain-syntax">(</span><span class="identifier-syntax">L</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">))) {</span>
<span class="plain-syntax"> *</span><span class="identifier-syntax">XP</span><span class="plain-syntax"> = </span><span class="identifier-syntax">L</span><span class="plain-syntax">; </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP4"></a><b>&#167;4. The natural language kind. </b>Inform has a kind built in called "natural language", whose values are
enumerated names: English language, French language, German language and so on.
When the kind is created, the following routine makes these instances. We do
this exactly as we would to create any other instance &mdash; we write a logical
proposition claiming its existence, then assert this to be true. It's an
interesting question whether the possibility of the game having been written
in German "belongs" in the model world, if in fact the game wasn't written
in German; but this is how we'll do it, anyway.
</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">NaturalLanguages::stock_nl_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inform_language</span><span class="plain-syntax"> *</span><span class="identifier-syntax">L</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">L</span><span class="plain-syntax">, </span><span class="identifier-syntax">inform_language</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop</span><span class="plain-syntax"> =</span>
<span class="plain-syntax"> </span><a href="11-tc.html#SP1" class="function-link"><span class="function-syntax">Calculus::Propositions::Abstract::to_create_something</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">L</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="12-ap.html#SP5" class="function-link"><span class="function-syntax">Calculus::Propositions::Assert::assert_true</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><span class="identifier-syntax">CERTAIN_CE</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">nl_instance</span><span class="plain-syntax"> = </span><span class="identifier-syntax">latest_instance</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP5"></a><b>&#167;5. The adaptive person. </b>The following is only relevant for the language of play, whose extension will
always be read in. That in turn is expected to contain a declaration like
this one:
</p>
<blockquote>
<p>The adaptive text viewpoint of the French language is second person singular.</p>
</blockquote>
<p class="commentary">The following routine picks up on the result of this declaration. (We cache
this because we need access to it very quickly when parsing text substitutions.)
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">NaturalLanguages::adaptive_person</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">NaturalLanguages::adaptive_person</span></span>:<br/>Introduction to Semantics - <a href="4-its.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inform_language</span><span class="plain-syntax"> *</span><span class="identifier-syntax">L</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="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">L</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">adaptive_person</span><span class="plain-syntax"> == -1) &amp;&amp; (</span><span class="identifier-syntax">P_adaptive_text_viewpoint</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax"> = </span><span class="identifier-syntax">L</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">nl_instance</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">spec</span><span class="plain-syntax"> = </span><a href="16-in.html#SP14" class="function-link"><span class="function-syntax">World::Inferences::get_prop_state</span></a><span class="plain-syntax">(</span>
<span class="plain-syntax"> </span><a href="5-ins.html#SP13" class="function-link"><span class="function-syntax">Instances::as_subject</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">), </span><span class="identifier-syntax">P_adaptive_text_viewpoint</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">ParseTree::is</span><span class="plain-syntax">(</span><span class="identifier-syntax">spec</span><span class="plain-syntax">, </span><span class="constant-syntax">CONSTANT_NT</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">V</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ParseTree::get_constant_instance</span><span class="plain-syntax">(</span><span class="identifier-syntax">spec</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">adaptive_person</span><span class="plain-syntax"> = </span><a href="5-ins.html#SP13" class="function-link"><span class="function-syntax">Instances::get_numerical_value</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">V</span><span class="plain-syntax">)-1;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> #</span><span class="identifier-syntax">endif</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">adaptive_person</span><span class="plain-syntax"> == -1) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FIRST_PERSON_PLURAL</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">L</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">adaptive_person</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP6"></a><b>&#167;6. Including Preform syntax. </b>At present we do this only for English, but some day...
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="function-syntax">NaturalLanguages::load_preform</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">NaturalLanguages::load_preform</span></span>:<br/>Introduction to Semantics - <a href="4-its.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inform_language</span><span class="plain-syntax"> *</span><span class="identifier-syntax">L</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">L</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">"can't load preform from null language"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">language_being_read_by_Preform</span><span class="plain-syntax"> = </span><span class="identifier-syntax">L</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">filename</span><span class="plain-syntax"> *</span><span class="identifier-syntax">preform_file</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Filenames::in</span><span class="plain-syntax">(</span><span class="identifier-syntax">Languages::path_to_bundle</span><span class="plain-syntax">(</span><span class="identifier-syntax">L</span><span class="plain-syntax">), </span><span class="identifier-syntax">I</span><span class="string-syntax">"Syntax.preform"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">PRINT</span><span class="plain-syntax">(</span><span class="string-syntax">"Reading language definition from &lt;%f&gt;\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">preform_file</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">Preform::load_from_file</span><span class="plain-syntax">(</span><span class="identifier-syntax">preform_file</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP7"></a><b>&#167;7. </b>Preform errors are handled here:
</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">NaturalLanguages::preform_error</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">NaturalLanguages::preform_error</span></span>:<br/>Introduction to Semantics - <a href="4-its.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">word_assemblage</span><span class="plain-syntax"> </span><span class="identifier-syntax">base_text</span><span class="plain-syntax">, </span><span class="identifier-syntax">nonterminal</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nt</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">production</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pr</span><span class="plain-syntax">, </span><span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="identifier-syntax">message</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">pr</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"The production at fault is:\n"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Preform::log_production</span><span class="plain-syntax">(</span><span class="identifier-syntax">pr</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">); </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"\n"</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">nt</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_text</span><span class="plain-syntax">(1, </span><span class="string-syntax">"(no nonterminal)"</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">Problems::quote_wide_text</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">Vocabulary::get_exemplar</span><span class="plain-syntax">(</span><span class="identifier-syntax">nt</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">nonterminal_id</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">Problems::quote_text</span><span class="plain-syntax">(2, </span><span class="identifier-syntax">message</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::Issue::handmade_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">Untestable</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">WordAssemblages::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">base_text</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wa</span><span class="plain-syntax">(5, &amp;</span><span class="identifier-syntax">base_text</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
<span class="plain-syntax"> </span><span class="string-syntax">"I'm having difficulties conjugating the verb '%5'. "</span><span class="plain-syntax">);</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">TEMP</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">pr</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_number</span><span class="plain-syntax">(3, &amp;(</span><span class="identifier-syntax">pr</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">match_number</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ptoken</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pt</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">pt</span><span class="plain-syntax"> = </span><span class="identifier-syntax">pr</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">first_ptoken</span><span class="plain-syntax">; </span><span class="identifier-syntax">pt</span><span class="plain-syntax">; </span><span class="identifier-syntax">pt</span><span class="plain-syntax"> = </span><span class="identifier-syntax">pt</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">next_ptoken</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Preform::write_ptoken</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">, </span><span class="identifier-syntax">pt</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">pt</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">next_ptoken</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">, </span><span class="string-syntax">" "</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_stream</span><span class="plain-syntax">(4, </span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
<span class="plain-syntax"> </span><span class="string-syntax">"There's a problem in Inform's linguistic grammar, which is probably "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"set by a translation extension. The problem occurs in line %3 of "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"%1 ('%4'): %2."</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">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
<span class="plain-syntax"> </span><span class="string-syntax">"There's a problem in Inform's linguistic grammar, which is probably "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"set by a translation extension. The problem occurs in the definition of "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"%1: %2."</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_end</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">TEMP</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
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