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/if-module/4-act.html
Graham Nelson 35658e125b Divided up Action Patterns section
2021-03-01 01:01:41 +00:00

224 lines
32 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>Actions</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="../core-module/index.html">core</a></li>
<li><a href="../assertions-module/index.html">assertions</a></li>
<li><a href="../values-module/index.html">values</a></li>
<li><a href="../knowledge-module/index.html">knowledge</a></li>
<li><a href="../imperative-module/index.html">imperative</a></li>
<li><a href="../runtime-module/index.html">runtime</a></li>
<li><a href="index.html"><span class="selectedlink">if</span></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 'Actions' generated by Inweb-->
<div class="breadcrumbs">
<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Inform7</a></li><li><a href="index.html">if</a></li><li><a href="index.html#4">Chapter 4: Actions</a></li><li><b>Actions</b></li></ul></div>
<p class="purpose">Each different sort of impulse to do something is an "action name".</p>
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. </b>An action is an impulse to do something within the model world, and there
will be many different sorts of impulse which a person may have: "going"
[i.e. somewhere], for example, or "wearing" [i.e. something].
</p>
<p class="commentary">Each of these different sorts of action is represented by an instance of
<a href="4-act.html#SP1" class="internal">action_name</a>, and each in turn corresponds to an instance of the enumerated
kind <span class="extract"><span class="extract-syntax">K_action_name</span></span> at run-time.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">action_naming_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">naming_data</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">action_semantics</span><span class="plain-syntax"> </span><span class="identifier-syntax">semantics</span><span class="plain-syntax">; </span><span class="comment-syntax"> see </span><a href="4-as.html" class="internal">Action Semantics</a>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">check_rules</span><span class="plain-syntax">; </span><span class="comment-syntax"> rulebooks private to this action</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">carry_out_rules</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">report_rules</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">stacked_variable_owner</span><span class="plain-syntax"> *</span><span class="identifier-syntax">action_variables</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">grammar_line</span><span class="plain-syntax"> *</span><span class="identifier-syntax">command_parser_grammar_producing_this</span><span class="plain-syntax">; </span><span class="comment-syntax"> if any</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">action_compilation_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">action_indexing_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">indexing_data</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">CLASS_DEFINITION</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">action_name</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>The structure action_name is accessed in 4/ap, 4/as, 4/av, 4/ann, 4/nap and here.</li></ul>
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>&#167;2. </b>Note that we notify the <span class="extract"><span class="extract-syntax">K_action_name</span></span> kind that a new enumerated value
for it exists; we don't need to record the reply (i.e. the number used as
this value at run-time) because it will be the same as the allocation ID
for the <a href="4-act.html#SP1" class="internal">action_name</a> structure in all cases.
</p>
<p class="commentary">As a historical note, until 2021 this code was still capable of generating
actions managed entirely by Inter code and without I7 rulebooks: something
which had not actually been done since around 2008.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="function-syntax">PL::Actions::act_new</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">PL::Actions::act_new</span></span>:<br/>Actions Plugin - <a href="4-ap.html#SP12">&#167;12</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">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">an</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">action_name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Kinds::Behaviour::new_enumerated_value</span><span class="plain-syntax">(</span><span class="identifier-syntax">K_action_name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="4-ann.html#SP3" class="function-link"><span class="function-syntax">ActionNameNames::baptise</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">); </span><span class="comment-syntax"> which sets its </span><span class="extract"><span class="extract-syntax">naming_data</span></span>
<span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">semantics</span><span class="plain-syntax"> = </span><a href="4-as.html#SP3" class="function-link"><span class="function-syntax">ActionSemantics::default</span></a><span class="plain-syntax">();</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">command_parser_grammar_producing_this</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">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">compilation_data</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RTActions::new_data</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">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">indexing_data</span><span class="plain-syntax"> = </span><span class="identifier-syntax">IXActions::new_data</span><span class="plain-syntax">();</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">check_rules</span><span class="plain-syntax"> = </span><a href="4-act.html#SP3" class="function-link"><span class="function-syntax">PL::Actions::new_rulebook</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">CHECK_RB_HL</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">carry_out_rules</span><span class="plain-syntax"> = </span><a href="4-act.html#SP3" class="function-link"><span class="function-syntax">PL::Actions::new_rulebook</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">CARRY_OUT_RB_HL</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">report_rules</span><span class="plain-syntax"> = </span><a href="4-act.html#SP3" class="function-link"><span class="function-syntax">PL::Actions::new_rulebook</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">REPORT_RB_HL</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">action_variables</span><span class="plain-syntax"> =</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">StackedVariables::new_owner</span><span class="plain-syntax">(</span><span class="identifier-syntax">RTActions::action_variable_set_ID</span><span class="plain-syntax">(</span><span class="identifier-syntax">an</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">ACTION_CREATIONS</span><span class="plain-syntax">, </span><span class="string-syntax">"Created action: %W\n"</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><span class="identifier-syntax">an</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>Rulebooks such as "check" would become far too large if they accumulated
every rule for checking anything; and so they are "fragmented" into individual
rulebooks per action, such as "check waiting" or "check dropping".
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="function-syntax">PL::Actions::new_rulebook</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">PL::Actions::new_rulebook</span></span>:<br/><a href="4-act.html#SP2">&#167;2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">RB</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><a href="4-ann.html#SP10" class="function-link"><span class="function-syntax">ActionNameNames::rulebook_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">RB</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">prefix_length</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Wordings::length</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">Wordings::length</span><span class="plain-syntax">(</span><a href="4-ann.html#SP5" class="function-link"><span class="function-syntax">ActionNameNames::tensed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">IS_TENSE</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Rulebooks::new_automatic</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_action_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">NO_OUTCOME</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">RTActions::rulebook_package</span><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">RB</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Rulebooks::fragment_by_actions</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">prefix_length</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">R</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>These functions goes from the global rulebook to the fragmented one for
a given action:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="function-syntax">PL::Actions::fragment_rulebook</span><span class="plain-syntax">(</span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rb</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">rb</span><span class="plain-syntax"> == </span><span class="identifier-syntax">built_in_rulebooks</span><span class="plain-syntax">[</span><span class="identifier-syntax">CHECK_RB</span><span class="plain-syntax">]) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">check_rules</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">rb</span><span class="plain-syntax"> == </span><span class="identifier-syntax">built_in_rulebooks</span><span class="plain-syntax">[</span><span class="identifier-syntax">CARRY_OUT_RB</span><span class="plain-syntax">]) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">carry_out_rules</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">rb</span><span class="plain-syntax"> == </span><span class="identifier-syntax">built_in_rulebooks</span><span class="plain-syntax">[</span><span class="identifier-syntax">REPORT_RB</span><span class="plain-syntax">]) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">report_rules</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"asked for peculiar fragmented rulebook"</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="plain-syntax">}</span>
<span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="function-syntax">PL::Actions::divert_to_another_actions_rulebook</span><span class="plain-syntax">(</span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_an</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">old_rulebook</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">new_an</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">old_an</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">old_an</span><span class="plain-syntax">, </span><span class="reserved-syntax">action_name</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">old_rulebook</span><span class="plain-syntax"> == </span><span class="identifier-syntax">old_an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">check_rules</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">new_an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">check_rules</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">old_rulebook</span><span class="plain-syntax"> == </span><span class="identifier-syntax">old_an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">carry_out_rules</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">new_an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">carry_out_rules</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">old_rulebook</span><span class="plain-syntax"> == </span><span class="identifier-syntax">old_an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">report_rules</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">new_an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">report_rules</span><span class="plain-syntax">;</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">old_rulebook</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>The <a href="5-pp.html" class="internal">Parsing Plugin</a> attaches command grammar to an action, but that's not
our concern here:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">PL::Actions::add_gl</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">PL::Actions::add_gl</span></span>:<br/>Grammar Lines - <a href="5-gl.html#SP3">&#167;3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="reserved-syntax">grammar_line</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gl</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">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">command_parser_grammar_producing_this</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">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">command_parser_grammar_producing_this</span><span class="plain-syntax"> = </span><span class="identifier-syntax">gl</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
<span class="plain-syntax"> </span><a href="5-gl.html#SP23" class="function-link"><span class="function-syntax">PL::Parsing::Lines::list_with_action_add</span></a><span class="plain-syntax">(</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">command_parser_grammar_producing_this</span><span class="plain-syntax">, </span><span class="identifier-syntax">gl</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">PL::Actions::remove_gl</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">PL::Actions::remove_gl</span></span>:<br/>Traverse for Grammar - <a href="5-tfg.html#SP19">&#167;19</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">an</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">an</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">command_parser_grammar_producing_this</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</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>Most actions are given automatically generated Inter identifiers, but a few
have to correspond to names referenced in <a href="../WorldModelKit/index.html" class="internal">WorldModelKit</a>, so:
</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">PL::Actions::translates</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">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">p</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="function-syntax">&lt;action-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">RTActions::translate</span><span class="plain-syntax">(</span><span class="function-syntax">&lt;&lt;rp&gt;&gt;</span><span class="plain-syntax">, </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">));</span>
<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">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"Tried action name %W\n"</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">StandardProblems::sentence_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(),</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_TranslatesNonAction</span><span class="plain-syntax">),</span>
<span class="plain-syntax"> </span><span class="string-syntax">"this does not appear to be the name of an action"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="string-syntax">"so cannot be translated into I6 at all."</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>
</pre>
<nav role="progress"><div class="progresscontainer">
<ul class="progressbar"><li class="progressprev"><a href="4-anaa.html">&#10094;</a></li><li class="progresschapter"><a href="P-wtmd.html">P</a></li><li class="progresschapter"><a href="1-im.html">1</a></li><li class="progresschapter"><a href="2-bd.html">2</a></li><li class="progresschapter"><a href="3-sm.html">3</a></li><li class="progresscurrentchapter">4</li><li class="progresssection"><a href="4-ap.html">ap</a></li><li class="progresssection"><a href="4-anaa.html">anaa</a></li><li class="progresscurrent">act</li><li class="progresssection"><a href="4-as.html">as</a></li><li class="progresssection"><a href="4-av.html">av</a></li><li class="progresssection"><a href="4-ann.html">ann</a></li><li class="progresssection"><a href="4-anl.html">anl</a></li><li class="progresssection"><a href="4-ap2.html">ap2</a></li><li class="progresssection"><a href="4-pap.html">pap</a></li><li class="progresssection"><a href="4-nap.html">nap</a></li><li class="progresschapter"><a href="5-pp.html">5</a></li><li class="progressnext"><a href="4-as.html">&#10095;</a></li></ul></div>
</nav><!--End of weave-->
</main>
</body>
</html>
Reference in a new issue View git blame Copy permalink