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<!--Weave of 'Articles and Pronouns' generated by Inweb-->
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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">linguistics</a></li><li><a href="index.html#3">Chapter 3: Grammatical Categories I</a></li><li><b>Articles and Pronouns</b></li></ul></div>
<p class="purpose">To define some elementary particles.</p>
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<ul class="toc"><li><a href="3-aap.html#SP1">&#167;1. Pronouns</a></li><li><a href="3-aap.html#SP2">&#167;2. Possessives</a></li><li><a href="3-aap.html#SP3">&#167;3. Articles</a></li><li><a href="3-aap.html#SP7">&#167;7. Participles</a></li><li><a href="3-aap.html#SP8">&#167;8. Negation</a></li><li><a href="3-aap.html#SP9">&#167;9. Marking for Preform efficiency</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1"></a><b>&#167;1. Pronouns. </b>We now define some grammatical basics. These are all very simple, and the user
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can't create new instances of them &mdash; whereas the source text can make new
adjectives, verbs and nouns, it can't make new pronouns.
</p>
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<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;pronoun&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;nominative-pronoun&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> R[1]</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;accusative-pronoun&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> R[1]</span>
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<span class="Preform-function-syntax">&lt;nominative-pronoun&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">it/he/she</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 1 </span><span class="Preform-comment-syntax"> singular</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">they</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 2 </span><span class="Preform-comment-syntax"> plural</span>
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<span class="Preform-function-syntax">&lt;accusative-pronoun&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">it/him/her</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 1 </span><span class="Preform-comment-syntax"> singular</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">them</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 2 </span><span class="Preform-comment-syntax"> plural</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-prf.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP2"></a><b>&#167;2. Possessives. </b>Inform uses these not only for parsing but also to inflect text. For example,
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if every person is given a nose, the player will see it as "my nose" not
"your nose". Inform handles such inflections by converting a pronoun in
one grammar into its corresponding pronoun in another (in this case, first
person to second person).
</p>
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<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;possessive-first-person&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">my</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 1 </span><span class="Preform-comment-syntax"> singular</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">our</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 2 </span><span class="Preform-comment-syntax"> plural</span>
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<span class="Preform-function-syntax">&lt;possessive-second-person&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">your</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 1 </span><span class="Preform-comment-syntax"> singular</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">your</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 2 </span><span class="Preform-comment-syntax"> plural</span>
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<span class="Preform-function-syntax">&lt;possessive-third-person&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">its/his/her</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 1 </span><span class="Preform-comment-syntax"> singular</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">their</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> 2 </span><span class="Preform-comment-syntax"> plural</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-prf.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3"></a><b>&#167;3. Articles. </b></p>
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<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="Preform-constant-syntax">DEF_ART</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">1</span><span class="Preform-plain-syntax"> </span><span class="Preform-comment-syntax"> the definite article</span>
<span class="definition-keyword">define</span> <span class="Preform-constant-syntax">INDEF_ART</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">2</span><span class="Preform-plain-syntax"> </span><span class="Preform-comment-syntax"> the indefinite article</span>
<span class="definition-keyword">define</span> <span class="Preform-constant-syntax">NO_ART</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">3</span><span class="Preform-plain-syntax"> </span><span class="Preform-comment-syntax"> no article supplied</span>
<span class="definition-keyword">define</span> <span class="Preform-constant-syntax">IT_ART</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">4</span><span class="Preform-plain-syntax"> </span><span class="Preform-comment-syntax"> a special case to handle "it"</span>
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</pre>
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<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;indefinite-article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> R[1]</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;definite-article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> R[1]</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-prf.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP4"></a><b>&#167;4. </b>The articles need to be single words, and the following two productions
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have an unusual convention: they are required to have production numbers
which encode both the implied grammatical number and gender.
</p>
<ul class="items"><li>(a) singular, neuter; (b) masculine; (c) feminine
</li><li>(d) plural, neuter; (e) masculine; (f) feminine
</li></ul>
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<p class="commentary">In English gender doesn't appear in articles, and "the" is ambiguous as to
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number in any case, so we end up with something quite dull:
</p>
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<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;definite-article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">/a/</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">the</span>
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<span class="Preform-function-syntax">&lt;indefinite-article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">/a/</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">a/an</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">/d/</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">some</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-prf.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP5"></a><b>&#167;5. </b>These are useful for stripping optional articles from text:
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</p>
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<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;optional-definite-article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;definite-article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span>
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<span class="Preform-function-syntax">&lt;optional-article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span>
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<span class="Preform-function-syntax">&lt;compulsory-article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;article&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-prf.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP6"></a><b>&#167;6. </b></p>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="function-syntax">Articles::remove_the</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">Articles::remove_the</span></span>:<br/>Parse Excerpts - <a href="2-pe.html#SP5_3">&#167;5.3</a><br/>Determiners and Quantifiers - <a href="3-daq.html#SP17">&#167;17</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">if</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">) &gt; </span><span class="constant-syntax">1</span><span class="plain-syntax">) &amp;&amp;</span>
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<span class="plain-syntax"> (</span><span class="function-syntax">&lt;optional-definite-article&gt;</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">))) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">GET_RW</span><span class="plain-syntax">(</span><span class="function-syntax">&lt;optional-definite-article&gt;</span><span class="plain-syntax">, </span><span class="constant-syntax">1</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">W</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="function-syntax">Articles::remove_article</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">Articles::remove_article</span></span>:<br/>Parse Excerpts - <a href="2-pe.html#SP5_3">&#167;5.3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="function-syntax">&lt;optional-article&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="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">GET_RW</span><span class="plain-syntax">(</span><span class="function-syntax">&lt;optional-article&gt;</span><span class="plain-syntax">, </span><span class="constant-syntax">1</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="identifier-syntax">W</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP7"></a><b>&#167;7. Participles. </b>Inform guesses that most English words ending in "-ing" are present
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participles &mdash; like guessing, bluffing, cheating, and so on. But there is
a conspicuous exception to this; so any word found in &lt;non-participles&gt;
is never treated as a participle.
</p>
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<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;non-participles&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">thing/something</span>
<span class="Preform-function-syntax">&lt;probable-participle&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">internal</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">1</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">{</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">if</span><span class="Preform-plain-syntax"> (</span><span class="Preform-identifier-syntax">Vocabulary::test_flags</span><span class="Preform-plain-syntax">(</span><span class="Preform-identifier-syntax">Wordings::first_wn</span><span class="Preform-plain-syntax">(</span><span class="Preform-identifier-syntax">W</span><span class="Preform-plain-syntax">), </span><span class="Preform-identifier-syntax">ING_MC</span><span class="Preform-plain-syntax">)) {</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">if</span><span class="Preform-plain-syntax"> (</span><span class="Preform-function-syntax">&lt;non-participles&gt;</span><span class="Preform-plain-syntax">(</span><span class="Preform-identifier-syntax">W</span><span class="Preform-plain-syntax">)) </span><span class="Preform-reserved-syntax">return</span><span class="Preform-plain-syntax"> </span><span class="Preform-identifier-syntax">FALSE</span><span class="Preform-plain-syntax">;</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">return</span><span class="Preform-plain-syntax"> </span><span class="Preform-identifier-syntax">TRUE</span><span class="Preform-plain-syntax">;</span>
<span class="Preform-plain-syntax"> }</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">return</span><span class="Preform-plain-syntax"> </span><span class="Preform-identifier-syntax">FALSE</span><span class="Preform-plain-syntax">;</span>
<span class="Preform-plain-syntax">}</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-prf.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP8"></a><b>&#167;8. Negation. </b></p>
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<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;negated-clause&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">not</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-prf.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP9"></a><b>&#167;9. Marking for Preform efficiency. </b></p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Articles::mark_for_preform</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">Articles::mark_for_preform</span></span>:<br/>Linguistics Module - <a href="1-lm.html#SP3">&#167;3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Optimiser::assign_bitmap_bit</span><span class="plain-syntax">(</span><span class="function-syntax">&lt;article&gt;</span><span class="plain-syntax">, </span><span class="constant-syntax">2</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Optimiser::assign_bitmap_bit</span><span class="plain-syntax">(</span><span class="function-syntax">&lt;definite-article&gt;</span><span class="plain-syntax">, </span><span class="constant-syntax">2</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Optimiser::assign_bitmap_bit</span><span class="plain-syntax">(</span><span class="function-syntax">&lt;indefinite-article&gt;</span><span class="plain-syntax">, </span><span class="constant-syntax">2</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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