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<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>Action Pattern Clauses</b></li></ul></div>
<p class="purpose">Pattern-matches on individual nouns in an action are called clauses.</p>
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. </b></p>
<pre class="definitions code-font"><span class="definition-keyword">enum</span> <span class="constant-syntax">ACTOR_AP_CLAUSE</span><span class="plain-syntax"> </span><span class="identifier-syntax">from</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span>
<span class="definition-keyword">enum</span> <span class="constant-syntax">NOUN_AP_CLAUSE</span>
<span class="definition-keyword">enum</span> <span class="constant-syntax">SECOND_AP_CLAUSE</span>
<span class="definition-keyword">enum</span> <span class="constant-syntax">IN_AP_CLAUSE</span>
<span class="definition-keyword">enum</span> <span class="constant-syntax">IN_THE_PRESENCE_OF_AP_CLAUSE</span>
<span class="definition-keyword">enum</span> <span class="constant-syntax">WHEN_AP_CLAUSE</span>
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</pre>
<pre class="displayed-code all-displayed-code code-font">
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<span class="definition-keyword">enum</span> <span class="constant-syntax">GOING_FROM_AP_CLAUSE</span>
<span class="definition-keyword">enum</span> <span class="constant-syntax">GOING_TO_AP_CLAUSE</span>
<span class="definition-keyword">enum</span> <span class="constant-syntax">GOING_THROUGH_AP_CLAUSE</span>
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<span class="definition-keyword">enum</span> <span class="constant-syntax">GOING_BY_AP_CLAUSE</span>
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<span class="definition-keyword">enum</span> <span class="constant-syntax">PUSHING_AP_CLAUSE</span>
<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">ap_clause</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">clause_ID</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</span><span class="plain-syntax"> *</span><span class="identifier-syntax">stv_to_match</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">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">clause_spec</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">clause_options</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">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">next</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">ap_clause</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>The structure ap_clause is accessed in 2/ri, 3/tm, 3/scn, 3/ts, 4/ap, 4/av, 5/tfg, 5/gl and here.</li></ul>
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>&#167;2. </b>The clause options are a bitmap. Some are meaningful only for one or two
clauses.
</p>
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">ALLOW_REGION_AS_ROOM_APCOPT</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span>
<span class="definition-keyword">define</span> <span class="constant-syntax">DO_NOT_VALIDATE_APCOPT</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span>
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<span class="definition-keyword">define</span> <span class="constant-syntax">TEST_BY_HAND_APCOPT</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span>
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</pre>
<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>&#167;3. </b></p>
<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::opt</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">APClauses::opt</span></span>:<br/><a href="4-apc.html#SP4">&#167;4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">opt</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> (((</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_options</span><span class="plain-syntax">)) &amp; </span><span class="identifier-syntax">opt</span><span class="plain-syntax">)?</span><span class="identifier-syntax">TRUE:FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::set_opt</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">APClauses::set_opt</span></span>:<br/><a href="4-apc.html#SP4">&#167;4</a><br/>Action Patterns - <a href="4-ap2.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">opt</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">apoc</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">"no such apoc"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">clause_options</span><span class="plain-syntax"> |= </span><span class="identifier-syntax">opt</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::clear_opt</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">APClauses::clear_opt</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">opt</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">apoc</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">"no such apoc"</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">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_options</span><span class="plain-syntax"> &amp; </span><span class="identifier-syntax">opt</span><span class="plain-syntax">) </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_options</span><span class="plain-syntax"> -= </span><span class="identifier-syntax">opt</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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<span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::get_actor</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">APClauses::get_actor</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP4">&#167;4</a>, <a href="4-ap2.html#SP5">&#167;5</a>, <a href="4-ap2.html#SP6">&#167;6</a>, <a href="4-ap2.html#SP8">&#167;8</a><br/>Parse Action Patterns - <a href="4-pap.html#SP21_1">&#167;21.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::get_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">ACTOR_AP_CLAUSE</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::set_actor</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">APClauses::set_actor</span></span>:<br/>Parse Action Patterns - <a href="4-pap.html#SP6">&#167;6</a>, <a href="4-pap.html#SP7">&#167;7</a>, <a href="4-pap.html#SP8">&#167;8</a>, <a href="4-pap.html#SP21_1">&#167;21.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</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>
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<span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::set_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">ACTOR_AP_CLAUSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::get_noun</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">APClauses::get_noun</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP4">&#167;4</a>, <a href="4-ap2.html#SP6">&#167;6</a>, <a href="4-ap2.html#SP8">&#167;8</a><br/>Parse Action Patterns - <a href="4-pap.html#SP21_1">&#167;21.1</a>, <a href="4-pap.html#SP21_5">&#167;21.5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::get_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">NOUN_AP_CLAUSE</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::set_noun</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">APClauses::set_noun</span></span>:<br/>Parse Action Patterns - <a href="4-pap.html#SP21_1">&#167;21.1</a>, <a href="4-pap.html#SP21_5">&#167;21.5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</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>
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<span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::set_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">NOUN_AP_CLAUSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::get_second</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">APClauses::get_second</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP4">&#167;4</a>, <a href="4-ap2.html#SP6">&#167;6</a>, <a href="4-ap2.html#SP8">&#167;8</a><br/>Parse Action Patterns - <a href="4-pap.html#SP21_1">&#167;21.1</a>, <a href="4-pap.html#SP21_5">&#167;21.5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::get_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">SECOND_AP_CLAUSE</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::set_second</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">APClauses::set_second</span></span>:<br/>Parse Action Patterns - <a href="4-pap.html#SP21_1">&#167;21.1</a>, <a href="4-pap.html#SP21_5">&#167;21.5</a>, <a href="4-pap.html#SP21_5_4">&#167;21.5.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</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>
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<span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::set_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">SECOND_AP_CLAUSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::get_presence</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">APClauses::get_presence</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP4">&#167;4</a>, <a href="4-ap2.html#SP6">&#167;6</a>, <a href="4-ap2.html#SP8">&#167;8</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::get_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">IN_THE_PRESENCE_OF_AP_CLAUSE</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::set_presence</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">APClauses::set_presence</span></span>:<br/>Parse Action Patterns - <a href="4-pap.html#SP16">&#167;16</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</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>
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<span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::set_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">IN_THE_PRESENCE_OF_AP_CLAUSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::get_room</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">APClauses::get_room</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP4">&#167;4</a>, <a href="4-ap2.html#SP6">&#167;6</a>, <a href="4-ap2.html#SP8">&#167;8</a><br/>Parse Action Patterns - <a href="4-pap.html#SP21_5">&#167;21.5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::get_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">IN_AP_CLAUSE</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::set_room</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">APClauses::set_room</span></span>:<br/>Parse Action Patterns - <a href="4-pap.html#SP17_1">&#167;17.1</a>, <a href="4-pap.html#SP21_5">&#167;21.5</a>, <a href="4-pap.html#SP21_5_4">&#167;21.5.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</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>
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<span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::set_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="constant-syntax">IN_AP_CLAUSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::get_val</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">APClauses::get_val</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP4">&#167;4</a>, <a href="4-ap2.html#SP6">&#167;6</a><br/>Parse Action Patterns - <a href="4-pap.html#SP21_1">&#167;21.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">C</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::clause</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</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">apoc</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_spec</span><span class="plain-syntax">):</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::set_val</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">APClauses::set_val</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP7">&#167;7</a><br/>Parse Action Patterns - <a href="4-pap.html#SP14">&#167;14</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">C</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val</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">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::clause</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</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">apoc</span><span class="plain-syntax">) </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_spec</span><span class="plain-syntax"> = </span><span class="identifier-syntax">val</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="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::ensure_clause</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_spec</span><span class="plain-syntax"> = </span><span class="identifier-syntax">val</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::nullify_nonspecific</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">APClauses::nullify_nonspecific</span></span>:<br/>Parse Action Patterns - <a href="4-pap.html#SP21_1">&#167;21.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">C</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::clause</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</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">apoc</span><span class="plain-syntax">) </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_spec</span><span class="plain-syntax"> = </span><a href="4-ap2.html#SP5" class="function-link"><span class="function-syntax">ActionPatterns::nullify_nonspecific_references</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_spec</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::clause</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">APClauses::clause</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP7">&#167;7</a><br/>Parse Action Patterns - <a href="4-pap.html#SP21_5_5">&#167;21.5.5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">C</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::find_clause</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::ensure_clause</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">APClauses::ensure_clause</span></span>:<br/><a href="4-apc.html#SP4">&#167;4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">C</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::find_clause</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::find_clause</span><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">C</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">make</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ap</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">last</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">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ap</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">ap_clauses</span><span class="plain-syntax">; </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">; </span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_ID</span><span class="plain-syntax"> == </span><span class="identifier-syntax">C</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">apoc</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">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_ID</span><span class="plain-syntax"> &gt; </span><span class="identifier-syntax">C</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">make</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="4-apc.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Make a new clause</span><span class="named-paragraph-number">3.1</span></a></span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</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>
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<span class="plain-syntax"> </span><span class="identifier-syntax">last</span><span class="plain-syntax"> = </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">make</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-apc.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Make a new clause</span><span class="named-paragraph-number">3.1</span></a></span><span class="plain-syntax">;</span>
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<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="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">make</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"cannot make clause in null AP"</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">NULL</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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</pre>
<p class="commentary firstcommentary"><a id="SP3_1" class="paragraph-anchor"></a><b>&#167;3.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make a new clause</span><span class="named-paragraph-number">3.1</span></span><span class="comment-syntax"> =</span>
</p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_apoc</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">new_apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_ID</span><span class="plain-syntax"> = </span><span class="identifier-syntax">C</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">new_apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">stv_to_match</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">new_apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_spec</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">new_apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_options</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">last</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">ap</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">ap_clauses</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_apoc</span><span class="plain-syntax">; </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">last</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_apoc</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">new_apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">apoc</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">new_apoc</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="4-apc.html#SP3">&#167;3</a> (twice).</li></ul>
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>&#167;4. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::ap_add_optional_clause</span><button class="popup" onclick="togglePopup('usagePopup19')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup19">Usage of <span class="code-font"><span class="function-syntax">APClauses::ap_add_optional_clause</span></span>:<br/>Parse Action Patterns - <a href="4-pap.html#SP21_3">&#167;21.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">stacked_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">stv</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">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">stv</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">"no stacked variable for apoc"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">spec</span><span class="plain-syntax"> = </span><a href="4-pap.html#SP2" class="function-link"><span class="function-syntax">ParseActionPatterns::verified_action_parameter</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">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">oid</span><span class="plain-syntax"> = </span><span class="identifier-syntax">StackedVariables::get_owner_id</span><span class="plain-syntax">(</span><span class="identifier-syntax">stv</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">off</span><span class="plain-syntax"> = </span><span class="identifier-syntax">StackedVariables::get_offset</span><span class="plain-syntax">(</span><span class="identifier-syntax">stv</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">C</span><span class="plain-syntax"> = </span><span class="constant-syntax">1000</span><span class="plain-syntax">*</span><span class="identifier-syntax">oid</span><span class="plain-syntax"> + </span><span class="identifier-syntax">off</span><span class="plain-syntax">, </span><span class="identifier-syntax">ar</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">byhand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">oid</span><span class="plain-syntax"> == </span><span class="constant-syntax">20007</span><span class="plain-syntax"> /* </span><span class="identifier-syntax">i</span><span class="plain-syntax">.</span><span class="identifier-syntax">e</span><span class="plain-syntax">., </span><span class="identifier-syntax">going</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">off</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">: </span><span class="identifier-syntax">C</span><span class="plain-syntax"> = </span><span class="constant-syntax">GOING_FROM_AP_CLAUSE</span><span class="plain-syntax">; </span><span class="identifier-syntax">ar</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="identifier-syntax">byhand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</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="constant-syntax">1</span><span class="plain-syntax">: </span><span class="identifier-syntax">C</span><span class="plain-syntax"> = </span><span class="constant-syntax">GOING_TO_AP_CLAUSE</span><span class="plain-syntax">; </span><span class="identifier-syntax">ar</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="identifier-syntax">byhand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</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="constant-syntax">2</span><span class="plain-syntax">: </span><span class="identifier-syntax">C</span><span class="plain-syntax"> = </span><span class="constant-syntax">GOING_THROUGH_AP_CLAUSE</span><span class="plain-syntax">; </span><span class="identifier-syntax">byhand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</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="constant-syntax">3</span><span class="plain-syntax">: </span><span class="identifier-syntax">C</span><span class="plain-syntax"> = </span><span class="constant-syntax">GOING_BY_AP_CLAUSE</span><span class="plain-syntax">; </span><span class="identifier-syntax">byhand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</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="constant-syntax">4</span><span class="plain-syntax">: </span><span class="identifier-syntax">C</span><span class="plain-syntax"> = </span><span class="constant-syntax">PUSHING_AP_CLAUSE</span><span class="plain-syntax">; </span><span class="identifier-syntax">byhand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::ensure_clause</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">stv_to_match</span><span class="plain-syntax"> = </span><span class="identifier-syntax">stv</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">clause_spec</span><span class="plain-syntax"> = </span><span class="identifier-syntax">spec</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">ar</span><span class="plain-syntax">) </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::set_opt</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">, </span><span class="constant-syntax">ALLOW_REGION_AS_ROOM_APCOPT</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">byhand</span><span class="plain-syntax">) </span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::set_opt</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">, </span><span class="constant-syntax">TEST_BY_HAND_APCOPT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::has_stv_clauses</span><button class="popup" onclick="togglePopup('usagePopup20')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup20">Usage of <span class="code-font"><span class="function-syntax">APClauses::has_stv_clauses</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP4">&#167;4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</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">ap</span><span class="plain-syntax">) &amp;&amp; (</span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::nudge_to_stv_apoc</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">ap_clauses</span><span class="plain-syntax">))) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::compare_specificity_of_apoc_list</span><button class="popup" onclick="togglePopup('usagePopup21')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup21">Usage of <span class="code-font"><span class="function-syntax">APClauses::compare_specificity_of_apoc_list</span></span>:<br/>Action Patterns - <a href="4-ap2.html#SP6">&#167;6</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap1</span><span class="plain-syntax">, </span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap2</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">rct1</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::ap_count_optional_clauses</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap1</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">rct2</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::ap_count_optional_clauses</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap2</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rct1</span><span class="plain-syntax"> &gt; </span><span class="identifier-syntax">rct2</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">1</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">rct1</span><span class="plain-syntax"> &lt; </span><span class="identifier-syntax">rct2</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> -1;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rct1</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc1</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::nudge_to_stv_apoc</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap1</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">ap_clauses</span><span class="plain-syntax">),</span>
<span class="plain-syntax"> *</span><span class="identifier-syntax">apoc2</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::nudge_to_stv_apoc</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap2</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">ap_clauses</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">apoc1</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">apoc2</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">off1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">StackedVariables::get_offset</span><span class="plain-syntax">(</span><span class="identifier-syntax">apoc1</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">stv_to_match</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">off2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">StackedVariables::get_offset</span><span class="plain-syntax">(</span><span class="identifier-syntax">apoc2</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">stv_to_match</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">off1</span><span class="plain-syntax"> == </span><span class="identifier-syntax">off2</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">rv</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Specifications::compare_specificity</span><span class="plain-syntax">(</span><span class="identifier-syntax">apoc1</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_spec</span><span class="plain-syntax">, </span><span class="identifier-syntax">apoc2</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_spec</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">rv</span><span class="plain-syntax"> != </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">rv</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">apoc1</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::nudge_to_stv_apoc</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc1</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">apoc2</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::nudge_to_stv_apoc</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc2</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">off1</span><span class="plain-syntax"> &lt; </span><span class="identifier-syntax">off2</span><span class="plain-syntax">) </span><span class="identifier-syntax">apoc1</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::nudge_to_stv_apoc</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc1</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">off1</span><span class="plain-syntax"> &gt; </span><span class="identifier-syntax">off2</span><span class="plain-syntax">) </span><span class="identifier-syntax">apoc2</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::nudge_to_stv_apoc</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc2</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::ap_count_optional_clauses</span><span class="plain-syntax">(</span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</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">n</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ap</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::nudge_to_stv_apoc</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">ap_clauses</span><span class="plain-syntax">); </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><a href="4-apc.html#SP4" class="function-link"><span class="function-syntax">APClauses::nudge_to_stv_apoc</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">n</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">n</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="function-syntax">APClauses::nudge_to_stv_apoc</span><span class="plain-syntax">(</span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">) &amp;&amp; ((</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">stv_to_match</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) ||</span>
<span class="plain-syntax"> (</span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::opt</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">, </span><span class="constant-syntax">TEST_BY_HAND_APCOPT</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">))) </span><span class="identifier-syntax">apoc</span><span class="plain-syntax"> = </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">apoc</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">APClauses::validate</span><button class="popup" onclick="togglePopup('usagePopup22')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup22">Usage of <span class="code-font"><span class="function-syntax">APClauses::validate</span></span>:<br/>Parse Action Patterns - <a href="4-pap.html#SP21_5_5">&#167;21.5.5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">ap_clause</span><span class="plain-syntax"> *</span><span class="identifier-syntax">apoc</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">) &amp;&amp;</span>
<span class="plain-syntax"> (</span><a href="4-apc.html#SP3" class="function-link"><span class="function-syntax">APClauses::opt</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">, </span><span class="constant-syntax">DO_NOT_VALIDATE_APCOPT</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">Dash::validate_parameter</span><span class="plain-syntax">(</span><span class="identifier-syntax">apoc</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">clause_spec</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">))</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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