ifhub/inform7
1
0
Fork 0
mirror of https://github.com/ganelson/inform.git synced 2024-07-08 10:04:21 +03:00
Code Issues Projects Releases Wiki Activity
inform7/docs/core-module/15-vp.html
Graham Nelson 22d2c3d8bd Moved sentence conversion into calculus module
2020-08-25 21:47:14 +01:00

336 lines
68 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>Valued Properties</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="../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="../if-module/index.html">if</a></li>
<li><a href="../multimedia-module/index.html">multimedia</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>Services</h2><ul>
<li><a href="../arch-module/index.html">arch</a></li>
<li><a href="../calculus-module/index.html">calculus</a></li>
<li><a href="../html-module/index.html">html</a></li>
<li><a href="../inflections-module/index.html">inflections</a></li>
<li><a href="../kinds-module/index.html">kinds</a></li>
<li><a href="../linguistics-module/index.html">linguistics</a></li>
<li><a href="../problems-module/index.html">problems</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="../../../inweb/docs/foundation-module/index.html">foundation</a></li>
</ul>
</nav>
<main role="main">
<!--Weave of 'Valued Properties' 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#15">Chapter 15: Properties</a></li><li><b>Valued Properties</b></li></ul></div>
<p class="purpose">Properties which consist of an attached value, always having a given kind.</p>
<ul class="toc"><li><a href="15-vp.html#SP1">&#167;1. Requesting new named properties</a></li><li><a href="15-vp.html#SP3">&#167;3. Requesting new nameless properties</a></li><li><a href="15-vp.html#SP4">&#167;4. Initialising details</a></li><li><a href="15-vp.html#SP5">&#167;5. Details</a></li><li><a href="15-vp.html#SP10">&#167;10. Assertion</a></li><li><a href="15-vp.html#SP11">&#167;11. Compilation</a></li></ul><hr class="tocbar">
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. Requesting new named properties. </b>The following asserts that <span class="extract"><span class="extract-syntax">(w1, w2)</span></span> is certainly a property; if it does not
exist, it will be created.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Valued::obtain</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">Properties::Valued::obtain</span></span>:<br/>Define by Table Requests - <a href="4-dbtr.html#SP4_2_1">&#167;4.2.1</a><br/>Assertions - <a href="5-ass.html#SP6_3_13">&#167;6.3.13</a>, <a href="5-ass.html#SP6_3_26">&#167;6.3.26</a><br/>New Property Assertions - <a href="5-npa.html#SP1_1">&#167;1.1</a><br/>Property Sentences - <a href="15-ps.html#SP5">&#167;5</a><br/>Condition Properties - <a href="15-cp.html#SP3">&#167;3</a></span></button><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="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="15-pr.html#SP3" class="function-link"><span class="function-syntax">Properties::obtain</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</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>Now the same: except that we require the property to have a given kind of
value, so that the process can go awry. (But we are allowed to avoid this
possibility by widening the kind, when this can be done.)
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Valued::obtain_within_kind</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">Properties::Valued::obtain_within_kind</span></span>:<br/>Relations - <a href="7-rlt.html#SP4_1_4">&#167;4.1.4</a></span></button><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">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">K</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K_object</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Kinds::weaken</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_object</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="function-syntax">&lt;property-name&gt;</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">prn</span><span class="plain-syntax"> = </span><span class="function-syntax">&lt;&lt;rp&gt;&gt;</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">existing_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">property_value_kind</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">Kinds::compatible</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">existing_kind</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">SOMETIMES_MATCH:</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Kinds::compatible</span><span class="plain-syntax">(</span><span class="identifier-syntax">existing_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">) != </span><span class="identifier-syntax">ALWAYS_MATCH</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="15-vp.html#SP2_1" class="named-paragraph-link"><span class="named-paragraph">Issue an incompatible property kind message</span><span class="named-paragraph-number">2.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">property_value_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K</span><span class="plain-syntax">; </span><span class="comment-syntax"> widen the kind of the property to make this fit</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">NEVER_MATCH:</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="15-vp.html#SP2_1" class="named-paragraph-link"><span class="named-paragraph">Issue an incompatible property kind message</span><span class="named-paragraph-number">2.1</span></a></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="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax"> = </span><a href="15-pr.html#SP3" class="function-link"><span class="function-syntax">Properties::obtain</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">property_value_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="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP2_1" class="paragraph-anchor"></a><b>&#167;2.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Issue an incompatible property kind message</span><span class="named-paragraph-number">2.1</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::sentence_problem</span><span class="plain-syntax">(</span><a href="1-wtc.html#SP6" 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_BadKOVForRelationProperty</span><span class="plain-syntax">),</span>
<span class="plain-syntax"> </span><span class="string-syntax">"that property already exists and contains a kind of value incompatible with "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"what we need here"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="string-syntax">"so you will need to give it a different name."</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">NULL</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="15-vp.html#SP2">&#167;2</a> (twice).</li></ul>
<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>&#167;3. Requesting new nameless properties. </b>Sometimes we will want a property which exists at run-time but which
has no name or visible existence at the Inform source text level. For
instance, the run-time code needs a property called <span class="extract"><span class="extract-syntax">vector</span></span> in which to
store partial results when finding routes through maps, but <span class="extract"><span class="extract-syntax">vector</span></span> is
nameless in the source text, unrecorded in the Index, and generally invisible
to the end user.
</p>
<p class="commentary">Core Inform creates no such properties, but many of the plugins do.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Valued::new_nameless</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">Properties::Valued::new_nameless</span></span>:<br/>Instance Counting - <a href="16-ic.html#SP11_1">&#167;11.1</a>, <a href="16-ic.html#SP11_2">&#167;11.2</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I6_form</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">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Feeds::feed_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">I6_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">K</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">"new nameless property without kind"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">package_request</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax"> = </span><a href="27-hr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::synoptic_package</span></a><span class="plain-syntax">(</span><span class="constant-syntax">PROPERTIES_HAP</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="27-hr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::markup</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="constant-syntax">PROPERTY_NAME_HMD</span><span class="plain-syntax">, </span><span class="identifier-syntax">I6_form</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">using_iname</span><span class="plain-syntax"> = </span><a href="27-hr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::make_iname_with_memo</span></a><span class="plain-syntax">(</span><span class="constant-syntax">PROPERTY_HL</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</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">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax"> = </span><a href="15-pr.html#SP4" class="function-link"><span class="function-syntax">Properties::create</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">using_iname</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="15-pr.html#SP17" class="function-link"><span class="function-syntax">Properties::exclude_from_index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><a href="15-pr.html#SP20" class="function-link"><span class="function-syntax">Properties::set_translation_S</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I6_form</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">property_value_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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">setting_bp</span><span class="plain-syntax"> = </span><a href="15-spr2.html#SP7" class="function-link"><span class="function-syntax">Properties::SettingRelations::make_set_nameless_property_BP</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">stored_bp</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">run_time_only</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</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">prn</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Valued::new_nameless_using</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">Properties::Valued::new_nameless_using</span></span>:<br/>Instance Counting - <a href="16-ic.html#SP11_2">&#167;11.2</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">package_request</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">using</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">K</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">"new nameless property without kind"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax"> = </span><a href="15-pr.html#SP4" class="function-link"><span class="function-syntax">Properties::create</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">using</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="15-pr.html#SP17" class="function-link"><span class="function-syntax">Properties::exclude_from_index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">property_value_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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">setting_bp</span><span class="plain-syntax"> = </span><a href="15-spr2.html#SP7" class="function-link"><span class="function-syntax">Properties::SettingRelations::make_set_nameless_property_BP</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">stored_bp</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">run_time_only</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><a href="15-pr.html#SP20" class="function-link"><span class="function-syntax">Properties::set_translation_S</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><a href="27-em.html#SP4" class="function-link"><span class="function-syntax">Emit::to_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">using</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">prn</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. Initialising details. </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">Properties::Valued::initialise</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">Properties::Valued::initialise</span></span>:<br/>Properties - <a href="15-pr.html#SP4_3">&#167;4.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">property_value_kind</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">setting_bp</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">used_for_non_typesafe_relation</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">also_a_type</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><a href="15-cp.html#SP2" class="function-link"><span class="function-syntax">Properties::Conditions::initialise</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><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">Properties::Valued::make_setting_relation</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">Properties::Valued::make_setting_relation</span></span>:<br/>Properties - <a href="15-pr.html#SP3">&#167;3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">binary_predicate</span><span class="plain-syntax"> *</span><span class="identifier-syntax">bp</span><span class="plain-syntax"> = </span><a href="15-spr2.html#SP4" class="function-link"><span class="function-syntax">Properties::SettingRelations::find_set_property_BP</span></a><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">bp</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">bp</span><span class="plain-syntax"> = </span><a href="15-spr2.html#SP3" class="function-link"><span class="function-syntax">Properties::SettingRelations::make_set_property_BP</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="15-spr2.html#SP5" class="function-link"><span class="function-syntax">Properties::SettingRelations::fix_property_bp</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">bp</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="15-spr2.html#SP5" class="function-link"><span class="function-syntax">Properties::SettingRelations::fix_property_bp</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">BinaryPredicates::get_reversal</span><span class="plain-syntax">(</span><span class="identifier-syntax">bp</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">setting_bp</span><span class="plain-syntax"> = </span><span class="identifier-syntax">bp</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. Details. </b>The most important fact about a valued property is what the kind of value is:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Valued::kind</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">Properties::Valued::kind</span></span>:<br/><a href="15-vp.html#SP11">&#167;11</a><br/>Define by Table Requests - <a href="4-dbtr.html#SP4_2_1">&#167;4.2.1</a><br/>New Property Requests - <a href="4-npr.html#SP5_11">&#167;5.11</a><br/>The Creator - <a href="5-tc.html#SP4_5">&#167;4.5</a><br/>Assertions - <a href="5-ass.html#SP6_3_25">&#167;6.3.25</a>, <a href="5-ass.html#SP6_3_41_7">&#167;6.3.41.7</a><br/>New Property Assertions - <a href="5-npa.html#SP2_1">&#167;2.1</a><br/>Property Knowledge - <a href="5-pk.html#SP4">&#167;4</a><br/>Tree Conversions - <a href="5-tc2.html#SP7_1">&#167;7.1</a><br/>Instances - <a href="6-ins.html#SP9">&#167;9</a><br/>RValues - <a href="14-rv.html#SP23_3">&#167;23.3</a><br/>Lvalues - <a href="14-lv.html#SP10">&#167;10</a>, <a href="14-lv.html#SP11_5">&#167;11.5</a><br/>Dash - <a href="14-ds2.html#SP10_9_1_1_2_1">&#167;10.9.1.1.2.1</a>, <a href="14-ds2.html#SP10_9_1_1_3_1_1">&#167;10.9.1.1.3.1.1</a>, <a href="14-ds2.html#SP12">&#167;12</a>, <a href="14-ds2.html#SP18_3_1">&#167;18.3.1</a><br/>Properties - <a href="15-pr.html#SP14">&#167;14</a><br/>Measurement Adjectives - <a href="15-ma.html#SP7_2">&#167;7.2</a><br/>Setting Property Relation - <a href="15-spr2.html#SP8">&#167;8</a>, <a href="15-spr2.html#SP9">&#167;9</a><br/>Emit Property Values - <a href="15-epv.html#SP1_1_4">&#167;1.1.4</a><br/>Inferences - <a href="16-in.html#SP13">&#167;13</a>, <a href="16-in.html#SP15">&#167;15</a><br/>Compile Invocations Inline - <a href="25-cii.html#SP3_1_1_4_11">&#167;3.1.1.4.11</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="comment-syntax"> for better type-checking Problems</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">property_value_kind</span><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">Properties::Valued::set_kind</span><button class="popup" onclick="togglePopup('usagePopup8')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup8">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::set_kind</span></span>:<br/><a href="15-vp.html#SP6">&#167;6</a><br/>Define by Table Requests - <a href="4-dbtr.html#SP4_2_1">&#167;4.2.1</a><br/>New Property Assertions - <a href="5-npa.html#SP2_1">&#167;2.1</a><br/>Relations - <a href="7-rlt.html#SP4_1_4">&#167;4.1.4</a>, <a href="7-rlt.html#SP4_10">&#167;4.10</a><br/>Properties - <a href="15-pr.html#SP4_6">&#167;4.6</a><br/>Plugin Calls - <a href="26-pc.html#SP6">&#167;6</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">K</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"tried to set null kind"</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</span><span class="plain-syntax">)) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"non-value property"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">Kinds::Behaviour::definite</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">do_not_compile</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_wording</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-sq.html#SP3" class="function-link"><span class="function-syntax">Problems::quote_kind</span></a><span class="plain-syntax">(2, </span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::handmade_problem</span><span class="plain-syntax">(</span><a href="1-wtc.html#SP6" 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_PropertyIndefinite</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">current_sentence</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_source</span><span class="plain-syntax">(3, </span><span class="identifier-syntax">current_sentence</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">"In the sentence %3, I am unable to create the property '%1', because "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"it has too vague a kind ('%2'). I need to know exactly what kind of "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"value goes into each property: for instance, it's not enough to say "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"'A door has a list of values called the access list', because I don't "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"know what the entries in this list would have to be - 'A door has a "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"list of people called the access list' would be better."</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">"I am unable to create the property '%1', because it has too vague "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"a kind ('%2'). I need to know exactly what kind of value goes into each "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"property: for instance, it's not enough to say 'A door has a list of values "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"called the access list', because I don't know what the entries in this "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"list would have to be - 'A door has a list of people called the access "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"list' would be better."</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="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">property_value_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>&#167;6. </b>Sometimes the name of a property is the same as that of a kind of value.
For instance, we might define a kind of value called "weight", and
then say that a thing has a weight: that makes a property also called
"weight", which is a value property whose value is always a weight.
</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">Properties::Valued::make_coincide_with_kind</span><button class="popup" onclick="togglePopup('usagePopup9')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup9">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::make_coincide_with_kind</span></span>:<br/>Properties - <a href="15-pr.html#SP4_4">&#167;4.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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><a href="15-vp.html#SP5" class="function-link"><span class="function-syntax">Properties::Valued::set_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</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">Kinds::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_grammatical_gender</span><span class="plain-syntax">)) </span><span class="identifier-syntax">P_grammatical_gender</span><span class="plain-syntax"> = </span><span class="identifier-syntax">prn</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">also_a_type</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="15-cp.html#SP5" class="function-link"><span class="function-syntax">Properties::Conditions::name_can_coincide_with_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><a href="6-ins.html#SP8" class="function-link"><span class="function-syntax">Instances::make_kind_coincident</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">prn</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">Properties::Valued::coincides_with_kind</span><button class="popup" onclick="togglePopup('usagePopup10')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup10">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::coincides_with_kind</span></span>:<br/>The Creator - <a href="5-tc.html#SP4_5">&#167;4.5</a><br/>Assertions - <a href="5-ass.html#SP6_3_25">&#167;6.3.25</a>, <a href="5-ass.html#SP6_3_41_7">&#167;6.3.41.7</a><br/>Dash - <a href="14-ds2.html#SP10_9_1_1_3_1_1">&#167;10.9.1.1.3.1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</span><span class="plain-syntax">)) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"non-value property"</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">also_a_type</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>&#167;7. </b>Every valued property has an associated relation to set its value.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">binary_predicate</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Valued::get_setting_bp</span><button class="popup" onclick="togglePopup('usagePopup11')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup11">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::get_setting_bp</span></span>:<br/>Tree Conversions - <a href="5-tc2.html#SP4">&#167;4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</span><span class="plain-syntax">)) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"non-value property"</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">setting_bp</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>&#167;8. </b>Some value properties are used for relation storage:
</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">Properties::Valued::set_stored_relation</span><button class="popup" onclick="togglePopup('usagePopup12')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup12">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::set_stored_relation</span></span>:<br/>Relations - <a href="7-rlt.html#SP4">&#167;4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><span class="identifier-syntax">binary_predicate</span><span class="plain-syntax"> *</span><span class="identifier-syntax">bp</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</span><span class="plain-syntax">)) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"non-value property"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">stored_bp</span><span class="plain-syntax"> = </span><span class="identifier-syntax">bp</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="identifier-syntax">binary_predicate</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Valued::get_stored_relation</span><button class="popup" onclick="togglePopup('usagePopup13')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup13">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::get_stored_relation</span></span>:<br/>Dash - <a href="14-ds2.html#SP9_1_1_3_1_3">&#167;9.1.1.3.1.3</a><br/>Inferences - <a href="16-in.html#SP19_3_3">&#167;19.3.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</span><span class="plain-syntax">)) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"non-value property"</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">stored_bp</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>&#167;9. </b>When a property is used to store certain forms of relation, it then needs
to store either a value within one of the domains, or else a null value used
to mean "this is not set at the moment". Since that null value isn't
a member of the domain, it follows that the property is breaking type safety
when it stores it. This means we need to relax typechecking to enable this
all to work; the following keep a flag to mark that.
</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">Properties::Valued::now_used_for_non_typesafe_relation</span><button class="popup" onclick="togglePopup('usagePopup14')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup14">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::now_used_for_non_typesafe_relation</span></span>:<br/>Relations - <a href="7-rlt.html#SP4_1_4">&#167;4.1.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</span><span class="plain-syntax">)) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"non-value property"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">used_for_non_typesafe_relation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</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">Properties::Valued::is_used_for_non_typesafe_relation</span><button class="popup" onclick="togglePopup('usagePopup15')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup15">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::is_used_for_non_typesafe_relation</span></span>:<br/><a href="15-vp.html#SP11">&#167;11</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">either_or</span><span class="plain-syntax">)) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"non-value property"</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">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">used_for_non_typesafe_relation</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>&#167;10. Assertion. </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">Properties::Valued::assert</span><button class="popup" onclick="togglePopup('usagePopup16')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup16">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::assert</span></span>:<br/>The Creator - <a href="5-tc.html#SP5_4_1_1">&#167;5.4.1.1</a><br/>Relations - <a href="7-rlt.html#SP20_1">&#167;20.1</a><br/>Indefinite Appearance - <a href="15-ia.html#SP1">&#167;1</a>, <a href="15-ia.html#SP2">&#167;2</a><br/>Instance Counting - <a href="16-ic.html#SP11_1">&#167;11.1</a>, <a href="16-ic.html#SP11_3_1">&#167;11.3.1</a>, <a href="16-ic.html#SP11_3_2">&#167;11.3.2</a>, <a href="16-ic.html#SP11_3_3">&#167;11.3.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><span class="reserved-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owner</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">val</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">certainty</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="5-tc2.html#SP4" class="function-link"><span class="function-syntax">Propositions::Abstract::to_set_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="12-ap.html#SP4" class="function-link"><span class="function-syntax">Propositions::Assert::assert_true_about</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><span class="identifier-syntax">owner</span><span class="plain-syntax">, </span><span class="identifier-syntax">certainty</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP11" class="paragraph-anchor"></a><b>&#167;11. Compilation. </b>When we compile the value of a valued property, the following is called.
In theory the result could depend on the property name; in practice it doesn't.
(But this would enable us to implement certain properties with different
storage methods at run-time if we wanted.)
</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">Properties::Valued::compile_value</span><button class="popup" onclick="togglePopup('usagePopup17')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup17">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::compile_value</span></span>:<br/>Properties - <a href="15-pr.html#SP25">&#167;25</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">value_holster</span><span class="plain-syntax"> *</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">val</span><span class="plain-syntax">) {</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><a href="15-vp.html#SP5" class="function-link"><span class="function-syntax">Properties::Valued::kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</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">K</span><span class="plain-syntax">) </span><a href="14-cfs.html#SP8" class="function-link"><span class="function-syntax">Specifications::Compiler::compile_constant_to_kind_vh</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</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">else</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="constant-syntax">BEGIN_COMPILATION_MODE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">COMPILATION_MODE_EXIT</span><span class="plain-syntax">(</span><span class="constant-syntax">DEREFERENCE_POINTERS_CMODE</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="14-cfs.html#SP5" class="function-link"><span class="function-syntax">Specifications::Compiler::compile_inner</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="constant-syntax">END_COMPILATION_MODE</span><span class="plain-syntax">;</span>
<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">Properties::Valued::compile_default_value</span><button class="popup" onclick="togglePopup('usagePopup18')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup18">Usage of <span class="code-font"><span class="function-syntax">Properties::Valued::compile_default_value</span></span>:<br/>Properties - <a href="15-pr.html#SP24">&#167;24</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">value_holster</span><span class="plain-syntax"> *</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="15-vp.html#SP9" class="function-link"><span class="function-syntax">Properties::Valued::is_used_for_non_typesafe_relation</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</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">Holsters::data_acceptable</span><span class="plain-syntax">(</span><span class="identifier-syntax">VH</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Holsters::holster_pair</span><span class="plain-syntax">(</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">LITERAL_IVAL</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</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><a href="15-vp.html#SP5" class="function-link"><span class="function-syntax">Properties::Valued::kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">current_sentence</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="13-rsfk.html#SP5" class="function-link"><span class="function-syntax">Kinds::RunTime::compile_default_value_vh</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax">, </span><span class="string-syntax">"property"</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_wording</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::handmade_problem</span><span class="plain-syntax">(</span><a href="1-wtc.html#SP6" 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_PropertyUninitialisable</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 am unable to put any value into the property '%1', because "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"it seems to have a kind of value which has no actual values."</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="plain-syntax">}</span>
</pre>
<nav role="progress"><div class="progresscontainer">
<ul class="progressbar"><li class="progressprev"><a href="15-ep.html">&#10094;</a></li><li class="progresschapter"><a href="P-wtmd.html">P</a></li><li class="progresschapter"><a href="1-cm.html">1</a></li><li class="progresschapter"><a href="2-up.html">2</a></li><li class="progresschapter"><a href="3-bv.html">3</a></li><li class="progresschapter"><a href="4-dlr.html">4</a></li><li class="progresschapter"><a href="5-rpt.html">5</a></li><li class="progresschapter"><a href="6-lp.html">6</a></li><li class="progresschapter"><a href="7-am.html">7</a></li><li class="progresschapter"><a href="8-ptu.html">8</a></li><li class="progresschapter"><a href="9-ef.html">9</a></li><li class="progresschapter"><a href="10-its.html">10</a></li><li class="progresschapter"></li><li class="progresschapter"><a href="12-terr.html">12</a></li><li class="progresschapter"><a href="13-kak.html">13</a></li><li class="progresschapter"><a href="14-sp.html">14</a></li><li class="progresscurrentchapter">15</li><li class="progresssection"><a href="15-pr.html">pr</a></li><li class="progresssection"><a href="15-ep.html">ep</a></li><li class="progresscurrent">vp</li><li class="progresssection"><a href="15-ps.html">ps</a></li><li class="progresssection"><a href="15-cp.html">cp</a></li><li class="progresssection"><a href="15-ia.html">ia</a></li><li class="progresssection"><a href="15-tpr.html">tpr</a></li><li class="progresssection"><a href="15-cr.html">cr</a></li><li class="progresssection"><a href="15-ma.html">ma</a></li><li class="progresssection"><a href="15-spr.html">spr</a></li><li class="progresssection"><a href="15-spr2.html">spr2</a></li><li class="progresssection"><a href="15-pov.html">pov</a></li><li class="progresssection"><a href="15-epv.html">epv</a></li><li class="progresschapter"><a href="16-is.html">16</a></li><li class="progresschapter"><a href="17-tl.html">17</a></li><li class="progresschapter"><a href="18-lc.html">18</a></li><li class="progresschapter"><a href="19-tc.html">19</a></li><li class="progresschapter"><a href="20-eq.html">20</a></li><li class="progresschapter"><a href="21-rl.html">21</a></li><li class="progresschapter"><a href="22-itp.html">22</a></li><li class="progresschapter"><a href="23-ad.html">23</a></li><li class="progresschapter"><a href="24-lv.html">24</a></li><li class="progresschapter"><a href="25-in.html">25</a></li><li class="progresschapter"><a href="26-fc.html">26</a></li><li class="progresschapter"><a href="27-hr.html">27</a></li><li class="progressnext"><a href="15-ps.html">&#10095;</a></li></ul></div>
</nav><!--End of weave-->
</main>
</body>
</html>
Reference in a new issue View git blame Copy permalink