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<main role="main">
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<!--Weave of 'New Activity Requests' generated by Inweb-->
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<div class="breadcrumbs">
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Inform7 Modules</a></li><li><a href="index.html">assertions</a></li><li><a href="index.html#3">Chapter 3: Requests</a></li><li><b>New Activity Requests</b></li></ul></div>
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<p class="purpose">Special sentences creating new activities.</p>
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b>This special meaning is only needed for one case. If activities are created
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by the sentence
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</p>
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<blockquote>
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<p>Counting is an activity on numbers.</p>
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</blockquote>
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<p class="commentary">then this happens via the regular meaning of "to be", because "activity on
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numbers" is a valid kind of value. But this:
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</p>
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<blockquote>
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<p>Describing is an activity.</p>
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</blockquote>
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<p class="commentary">can't be handled that way because "activity" is not a valid kind. And so we
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handle this case through a special case of "X is Y" which applies only if Y
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matches:
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</p>
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<pre class="Preform-displayed-code all-displayed-code code-font">
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<span class="Preform-function-syntax"><bare-activity-sentence-object></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
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<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><article></span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">activity</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span>
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<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">activity</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-ap.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b></p>
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<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">ActivityRequests::new_activity_SMF</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">ActivityRequests::new_activity_SMF</span></span>:<br/>Booting Verbs - <a href="2-bv.html#SP1_3">§1.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">task</span><span class="plain-syntax">, </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">V</span><span class="plain-syntax">, </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> *</span><span class="identifier-syntax">NPs</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">SW</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">NPs</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">NPs</span><span class="plain-syntax">[0]):</span><span class="identifier-syntax">EMPTY_WORDING</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">OW</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">NPs</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">NPs</span><span class="plain-syntax">[1]):</span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">task</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="identifier-syntax">ACCEPT_SMFT:</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="function-syntax"><bare-activity-sentence-object></span><span class="plain-syntax">(</span><span class="identifier-syntax">OW</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="function-syntax"><np-unparsed></span><span class="plain-syntax">(</span><span class="identifier-syntax">SW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">V</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="function-syntax"><<rp>></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="function-syntax"><np-unparsed></span><span class="plain-syntax">(</span><span class="identifier-syntax">OW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">V</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="function-syntax"><<rp>></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">TRUE</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">break</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="identifier-syntax">PASS_1_SMFT:</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Activities::new</span><span class="plain-syntax">(</span><span class="identifier-syntax">Kinds::unary_con</span><span class="plain-syntax">(</span><span class="identifier-syntax">CON_activity</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_nil</span><span class="plain-syntax">),</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">V</span><span class="plain-syntax">-></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">break</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">return</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>
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