ifhub/inform7
1
0
Fork 0
mirror of https://github.com/ganelson/inform.git synced 2024-07-05 08:34:22 +03:00
Code Issues Projects Releases Wiki Activity
inform7/docs/assertions-module/2-ar.html
Graham Nelson 3ea9ce725f Second attempt to reconcile links
2022-04-28 17:37:28 +01:00

231 lines
31 KiB
HTML
Raw Blame History

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Anaphoric References</title>
<link href="../docs-assets/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="../docs-assets/Contents.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="../docs-assets/Progress.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="../docs-assets/Navigation.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="../docs-assets/Fonts.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="../docs-assets/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="../docs-assets/Popups.css" rel="stylesheet" rev="stylesheet" type="text/css">
<link href="../docs-assets/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-assets/Inform.png" height=72">
</a></h1>
<ul><li><a href="../index.html">home</a></li>
</ul><h2>Compiler</h2><ul>
<li><a href="../structure.html">structure</a></li>
<li><a href="../inbuildn.html">inbuild</a></li>
<li><a href="../inform7n.html">inform7</a></li>
<li><a href="../intern.html">inter</a></li>
<li><a href="../services.html">services</a></li>
<li><a href="../secrets.html">secrets</a></li>
</ul><h2>Other Tools</h2><ul>
<li><a href="../inblorbn.html">inblorb</a></li>
<li><a href="../indocn.html">indoc</a></li>
<li><a href="../inform6.html">inform6</a></li>
<li><a href="../inpolicyn.html">inpolicy</a></li>
<li><a href="../inrtpsn.html">inrtps</a></li>
</ul><h2>Resources</h2><ul>
<li><a href="../extensions.html">extensions</a></li>
<li><a href="../kits.html">kits</a></li>
</ul><h2>Repository</h2><ul>
<li><a href="https://github.com/ganelson/inform"><img src="../docs-assets/github.png" height=18> github</a></li>
</ul><h2>Related Projects</h2><ul>
<li><a href="../../../inweb/index.html">inweb</a></li>
<li><a href="../../../intest/index.html">intest</a></li>
</ul>
</nav>
<main role="main">
<!--Weave of 'Anaphoric References' generated by Inweb-->
<div class="breadcrumbs">
<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../inform7n.html">Inform7</a></li><li><a href="index.html">assertions</a></li><li><a href="index.html#2">Chapter 2: Declarations</a></li><li><b>Anaphoric References</b></li></ul></div>
<p class="purpose">To keep track of the current object and subject of discussion.</p>
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. </b>Inform is deliberately minimal when allowing the use of pronouns which carry
meanings from one sentence to another. It is unclear exactly how natural
language does this, and while some theories are more persuasive than others,
all seem vulnerable to odd cases that they get "wrong". It's therefore
hard to program a computer to understand "it" so that human users are
happy with the result.
</p>
<p class="commentary">But we try, just a little, by keeping track of the subject and object
under discussion. Even this is tricky. Consider:
</p>
<blockquote>
<p>The Pavilion is a room. East is the Cricket Square.</p>
</blockquote>
<p class="commentary">East of where? Clearly of the current subject, the Pavilion (not
the room kind). On the other hand,
</p>
<blockquote>
<p>On the desk is a pencil. It has description "2B."</p>
</blockquote>
<p class="commentary">"It" here is the pencil, not the desk. To disentangle such things,
we keep track of two different running references: the current subject and
the current object. English is an SVO language, so that in assertions of the
form "X is Y", X is the subject and Y the object. But it will turn out to
be more complicated than that, because we disregard all references which are
not to tangible things and kinds.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="function-syntax">Anaphora::get_current_subject</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">Anaphora::get_current_subject</span></span>:<br/>Assertions - <a href="4-ass.html#SP2">&#167;2</a>, <a href="4-ass.html#SP6_3_41_1">&#167;6.3.41.1</a>, <a href="4-ass.html#SP6_3_41_4">&#167;6.3.41.4</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="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_of_sentences</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="function-syntax">Anaphora::get_current_object</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">Anaphora::get_current_object</span></span>:<br/>Refine Parse Tree - <a href="4-rpt.html#SP11_7">&#167;11.7</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="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">object_of_sentences</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Anaphora::get_current_subject_plurality</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">Anaphora::get_current_subject_plurality</span></span>:<br/>Refine Parse Tree - <a href="4-rpt.html#SP11_7">&#167;11.7</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="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_seems_to_be_plural</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>&#167;2. </b>The routine <span class="extract"><span class="extract-syntax">Anaphora::new_discussion</span></span> is called when we reach a
heading or other barrier in the source text, to make clear that there has
been a change of the topic discussed.
</p>
<p class="commentary"><span class="extract"><span class="extract-syntax">Anaphora::change_discussion_topic</span></span> is called once at the end of
processing each assertion during each pass.
</p>
<p class="commentary">Note that we are careful to avoid changing the subject with sentences like:
</p>
<blockquote>
<p>East is the Central Plaza.</p>
</blockquote>
<p class="commentary">where this does not have the subject "east", but has instead an implicit
subject carried over from previous sentences.
</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">Anaphora::new_discussion</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">Anaphora::new_discussion</span></span>:<br/><a href="2-ar.html#SP3">&#167;3</a><br/>Passes through Major Nodes - <a href="2-ptmn.html#SP2">&#167;2</a>, <a href="2-ptmn.html#SP3_1">&#167;3.1</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="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_of_sentences</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">PRONOUNS</span><span class="plain-syntax">, </span><span class="string-syntax">"[Forgotten subject of sentences: $j]\n"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_of_sentences</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">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_of_sentences</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">PRONOUNS</span><span class="plain-syntax">, </span><span class="string-syntax">"[Forgotten object of sentences: $j]\n"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">object_of_sentences</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_of_sentences</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">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">object_of_sentences</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">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_seems_to_be_plural</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="SP3" class="paragraph-anchor"></a><b>&#167;3. </b>The slight asymmetry in what follows is partly pragmatic, partly the result
of subject-verb inversion ("in the bag is the ball" not "the ball is in the
bag"). We extract a subject from a relationship node on the left, but not on
the right, and we don't extract an object from one. Consider:
</p>
<blockquote>
<p>A billiards table is in the Gazebo. On it is a trophy cup.</p>
</blockquote>
<p class="commentary">What does "it" mean, and why? A human reader goes for the billiards table at
once, because it seems more likely as a supporter than the Gazebo, but that's
not how Inform gets the same answer. It all hangs on "billiards table" being
the object of the first sentence, not the Gazebo; if we descended the RHS,
which is <span class="extract"><span class="extract-syntax">RELATIONSHIP_NT -&gt; PROPER_NOUN_NT</span></span> pointing to the Gazebo, that's the
conclusion we would have reached.
</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">Anaphora::change_discussion_from_coupling</span><button class="popup" onclick="togglePopup('usagePopup5')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup5">Usage of <span class="code-font"><span class="function-syntax">Anaphora::change_discussion_from_coupling</span></span>:<br/>Passes through Major Nodes - <a href="2-ptmn.html#SP3_1_2_3">&#167;3.1.2.3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">px</span><span class="plain-syntax">, </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">py</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">infsx</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">infsy</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">infsy_full</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">infsx</span><span class="plain-syntax"> = </span><a href="2-ar.html#SP4" class="function-link"><span class="function-syntax">Anaphora::discussed_at_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">px</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">infsy_full</span><span class="plain-syntax"> = </span><a href="2-ar.html#SP4" class="function-link"><span class="function-syntax">Anaphora::discussed_at_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">py</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">Node::get_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">py</span><span class="plain-syntax">) != </span><span class="identifier-syntax">KIND_NT</span><span class="plain-syntax">) </span><span class="identifier-syntax">infsy</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">py</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-ar.html#SP3" class="function-link"><span class="function-syntax">Anaphora::change_discussion_topic</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">infsx</span><span class="plain-syntax">, </span><span class="identifier-syntax">infsy</span><span class="plain-syntax">, </span><span class="identifier-syntax">infsy_full</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">Node::get_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">px</span><span class="plain-syntax">) == </span><span class="identifier-syntax">AND_NT</span><span class="plain-syntax">) </span><a href="2-ar.html#SP5" class="function-link"><span class="function-syntax">Anaphora::subject_of_discussion_a_list</span></a><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">Annotations::read_int</span><span class="plain-syntax">(</span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">, </span><span class="identifier-syntax">clears_pronouns_ANNOT</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><a href="2-ar.html#SP2" class="function-link"><span class="function-syntax">Anaphora::new_discussion</span></a><span class="plain-syntax">();</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Anaphora::change_discussion_topic</span><span class="plain-syntax">(</span><span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">infsx</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">infsy</span><span class="plain-syntax">, </span><span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">infsy_full</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">old_sub</span><span class="plain-syntax"> = </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_of_sentences</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> *</span><span class="identifier-syntax">old_obj</span><span class="plain-syntax"> = </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">object_of_sentences</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_seems_to_be_plural</span><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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Wordings::length</span><span class="plain-syntax">(</span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">)) &gt; </span><span class="constant-syntax">1</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">near_start_of_extension</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">Node::set_interpretation_of_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_of_sentences</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">Annotations::node_has</span><span class="plain-syntax">(</span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">, </span><span class="identifier-syntax">implicit_in_creation_of_ANNOT</span><span class="plain-syntax">))</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">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">Map::subject_is_a_direction</span><span class="plain-syntax">(</span><span class="identifier-syntax">infsx</span><span class="plain-syntax">)) &amp;&amp;</span>
<span class="plain-syntax"> ((</span><span class="identifier-syntax">InstanceSubjects::to_object_instance</span><span class="plain-syntax">(</span><span class="identifier-syntax">infsx</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">InstanceSubjects::to_object_instance</span><span class="plain-syntax">(</span><span class="identifier-syntax">infsy_full</span><span class="plain-syntax">)))) </span><span class="identifier-syntax">infsx</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">endif</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">infsx</span><span class="plain-syntax">) </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="identifier-syntax">subject_of_sentences</span><span class="plain-syntax"> = </span><span class="identifier-syntax">infsx</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">infsy</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">KindSubjects::to_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">infsy</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">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">object_of_sentences</span><span class="plain-syntax"> = </span><span class="identifier-syntax">infsy</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">infsx</span><span class="plain-syntax">) </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">object_of_sentences</span><span class="plain-syntax"> = </span><span class="identifier-syntax">infsx</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">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_of_sentences</span><span class="plain-syntax"> != </span><span class="identifier-syntax">old_sub</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">PRONOUNS</span><span class="plain-syntax">, </span><span class="string-syntax">"[Changed subject of sentences to $j]\n"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_of_sentences</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">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">object_of_sentences</span><span class="plain-syntax"> != </span><span class="identifier-syntax">old_obj</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">PRONOUNS</span><span class="plain-syntax">, </span><span class="string-syntax">"[Changed object of sentences to $j]\n"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">object_of_sentences</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>&#167;4. </b></p>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="function-syntax">Anaphora::discussed_at_node</span><button class="popup" onclick="togglePopup('usagePopup6')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup6">Usage of <span class="code-font"><span class="function-syntax">Anaphora::discussed_at_node</span></span>:<br/><a href="2-ar.html#SP3">&#167;3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pn</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">infs</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><span class="identifier-syntax">Node::get_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">) != </span><span class="identifier-syntax">KIND_NT</span><span class="plain-syntax">) </span><span class="identifier-syntax">infs</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</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">Node::get_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">) == </span><span class="identifier-syntax">RELATIONSHIP_NT</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">pn</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">down</span><span class="plain-syntax">) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">Node::get_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">down</span><span class="plain-syntax">) == </span><span class="identifier-syntax">PROPER_NOUN_NT</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">infs</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">down</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">Node::get_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">) == </span><span class="identifier-syntax">WITH_NT</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">pn</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">down</span><span class="plain-syntax">) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">Node::get_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">down</span><span class="plain-syntax">) == </span><span class="identifier-syntax">PROPER_NOUN_NT</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">infs</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">down</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">infs</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>&#167;5. </b>Occasionally we need to force the issue, though:
</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">Anaphora::subject_of_discussion_a_list</span><button class="popup" onclick="togglePopup('usagePopup7')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup7">Usage of <span class="code-font"><span class="function-syntax">Anaphora::subject_of_discussion_a_list</span></span>:<br/><a href="2-ar.html#SP3">&#167;3</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">global_pass_state</span><span class="plain-syntax">.</span><span class="element-syntax">subject_seems_to_be_plural</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<nav role="progress"><div class="progresscontainer">
<ul class="progressbar"><li class="progressprev"><a href="2-ptmn.html">&#10094;</a></li><li class="progresschapter"><a href="P-wtmd.html">P</a></li><li class="progresschapter"><a href="1-am.html">1</a></li><li class="progresscurrentchapter">2</li><li class="progresssection"><a href="2-bv.html">bv</a></li><li class="progresssection"><a href="2-ptmn.html">ptmn</a></li><li class="progresscurrent">ar</li><li class="progresssection"><a href="2-cs.html">cs</a></li><li class="progresssection"><a href="2-ps.html">ps</a></li><li class="progresssection"><a href="2-is.html">is</a></li><li class="progresschapter"><a href="3-dlr.html">3</a></li><li class="progresschapter"><a href="4-nr.html">4</a></li><li class="progresschapter"><a href="5-id.html">5</a></li><li class="progresschapter"><a href="6-rls.html">6</a></li><li class="progresschapter"><a href="7-tc.html">7</a></li><li class="progresschapter"><a href="8-kpr.html">8</a></li><li class="progressnext"><a href="2-cs.html">&#10095;</a></li></ul></div>
</nav><!--End of weave-->
</main>
</body>
</html>
Reference in a new issue View git blame Copy permalink