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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../units.html">Unit Test Tools</a></li><li><a href="index.html">kinds-test</a></li><li><a href="index.html#1">Chapter 1: Scaffolding</a></li><li><b>Declarations</b></li></ul></div>
<p class="purpose">Reading declarations from a file.</p>
<ul class="toc"><li><a href="1-dcl.html#SP1">&#167;1. Keeping the syntax module happy</a></li><li><a href="1-dcl.html#SP2">&#167;2. Loading kinds</a></li><li><a href="1-dcl.html#SP3">&#167;3. Loading from a file</a></li></ul><hr class="tocbar">
<p class="commentary firstcommentary"><a id="SP1"></a><b>&#167;1. Keeping the syntax module happy. </b>We are going to need to use the sentence-breaking apparatus from the <a href="../syntax-module/index.html" class="internal">syntax</a>
module, which means that the following four nonterminals need to exist. But in
fact they are really just placeholders &mdash; they are wired so that they can never
match any text.
</p>
<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;dividing-sentence&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">==&gt;</span><span class="Preform-plain-syntax"> { fail }</span>
<span class="Preform-function-syntax">&lt;structural-sentence&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">==&gt;</span><span class="Preform-plain-syntax"> { fail }</span>
<span class="Preform-function-syntax">&lt;language-modifying-sentence&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">==&gt;</span><span class="Preform-plain-syntax"> { fail }</span>
<span class="Preform-function-syntax">&lt;comma-divisible-sentence&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">==&gt;</span><span class="Preform-plain-syntax"> { fail }</span>
</pre>
<ul class="endnotetexts"><li>This is <a href="../words-module/4-ap.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
<p class="commentary firstcommentary"><a id="SP2"></a><b>&#167;2. Loading kinds. </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">Declarations::load_kinds</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">Declarations::load_kinds</span></span>:<br/>Program Control - <a href="1-pc.html#SP2">&#167;2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">arg</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">filename</span><span class="plain-syntax"> *</span><span class="identifier-syntax">F</span><span class="plain-syntax"> = </span><a href="../../../inweb/docs/foundation-module/3-fln.html#SP3" class="function-link"><span class="function-syntax">Filenames::from_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">arg</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="../../../inweb/docs/foundation-module/4-tf.html#SP5" class="function-link"><span class="function-syntax">TextFiles::read</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">F</span><span class="plain-syntax">, </span><span class="constant-syntax">FALSE</span><span class="plain-syntax">, </span><span class="string-syntax">"unable to read kinds file"</span><span class="plain-syntax">, </span><span class="constant-syntax">TRUE</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> &amp;</span><a href="1-dcl.html#SP2" class="function-link"><span class="function-syntax">Declarations::load_kinds_helper</span></a><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</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">void</span><span class="plain-syntax"> </span><span class="function-syntax">Declarations::load_kinds_helper</span><span class="plain-syntax">(</span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">text</span><span class="plain-syntax">, </span><span class="reserved-syntax">text_file_position</span><span class="plain-syntax"> *</span><span class="identifier-syntax">tfp</span><span class="plain-syntax">, </span><span class="reserved-syntax">void</span><span class="plain-syntax"> *</span><span class="identifier-syntax">state</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><a href="../../../inweb/docs/foundation-module/4-sm.html#SP13" class="function-link"><span class="function-syntax">Str::get_first_char</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">text</span><span class="plain-syntax">) == </span><span class="character-syntax">'!'</span><span class="plain-syntax">) ||</span>
<span class="plain-syntax"> (</span><a href="../../../inweb/docs/foundation-module/4-sm.html#SP13" class="function-link"><span class="function-syntax">Str::get_first_char</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">text</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="comment-syntax"> skip blanks and comments</span>
<span class="plain-syntax"> </span><a href="../kinds-module/2-ki.html#SP14" class="function-link"><span class="function-syntax">Kinds::Interpreter::despatch_kind_command</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">text</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP3"></a><b>&#167;3. Loading from a file. </b>The following function reads a file whose name is in <span class="extract"><span class="extract-syntax">arg</span></span>, feeds it into
the lexer, builds a syntax tree of its sentences, and then walks through
that tree, applying the Preform nonterminal &lt;declaration-line&gt; to each
sentence.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">parse_node_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">syntax_tree</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Declarations::load_from_file</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">Declarations::load_from_file</span></span>:<br/>Program Control - <a href="1-pc.html#SP2">&#167;2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">arg</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">filename</span><span class="plain-syntax"> *</span><span class="identifier-syntax">F</span><span class="plain-syntax"> = </span><a href="../../../inweb/docs/foundation-module/3-fln.html#SP3" class="function-link"><span class="function-syntax">Filenames::from_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">arg</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="constant-syntax">feed_t</span><span class="plain-syntax"> </span><span class="identifier-syntax">FD</span><span class="plain-syntax"> = </span><a href="../words-module/3-fds.html#SP2" class="function-link"><span class="function-syntax">Feeds::begin</span></a><span class="plain-syntax">();</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">source_file</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sf</span><span class="plain-syntax"> = </span><a href="../words-module/3-tff.html#SP3" class="function-link"><span class="function-syntax">TextFromFiles::feed_into_lexer</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">F</span><span class="plain-syntax">, </span><span class="constant-syntax">NULL_GENERAL_POINTER</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax"> = </span><a href="../words-module/3-fds.html#SP2" class="function-link"><span class="function-syntax">Feeds::end</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">FD</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">sf</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) { </span><span class="identifier-syntax">PRINT</span><span class="plain-syntax">(</span><span class="string-syntax">"File has failed to open\n"</span><span class="plain-syntax">); </span><span class="reserved-syntax">return</span><span class="plain-syntax">; }</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">syntax_tree</span><span class="plain-syntax"> = </span><a href="../syntax-module/2-st.html#SP2" class="function-link"><span class="function-syntax">SyntaxTree::new</span></a><span class="plain-syntax">();</span>
<span class="plain-syntax"> </span><a href="../syntax-module/3-snt.html#SP5" class="function-link"><span class="function-syntax">Sentences::break</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">syntax_tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="../syntax-module/2-st.html#SP10" class="function-link"><span class="function-syntax">SyntaxTree::traverse</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">syntax_tree</span><span class="plain-syntax">, </span><a href="1-dcl.html#SP3" class="function-link"><span class="function-syntax">Declarations::parse</span></a><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Declarations::parse</span><span class="plain-syntax">(</span><span class="reserved-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">p</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="../syntax-module/2-pn.html#SP5" class="function-link"><span class="function-syntax">Node::get_type</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">) == </span><span class="constant-syntax">SENTENCE_NT</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax"> = </span><a href="../syntax-module/2-pn.html#SP4" class="function-link"><span class="function-syntax">Node::get_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="function-syntax">&lt;declaration-line&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="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP4"></a><b>&#167;4. </b></p>
<pre class="definitions code-font"><span class="definition-keyword">enum</span> <span class="constant-syntax">symbol_CLASS</span>
<span class="definition-keyword">define</span> <span class="constant-syntax">SYMBOL_MC</span><span class="plain-syntax"> </span><span class="constant-syntax">0x80</span>
<span class="definition-keyword">define</span> <span class="constant-syntax">EXACT_PARSING_BITMAP</span>
<span class="plain-syntax"> (</span><span class="constant-syntax">SYMBOL_MC</span><span class="plain-syntax"> + </span><span class="constant-syntax">KIND_SLOW_MC</span><span class="plain-syntax">)</span>
</pre>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">DECLARE_CLASS</span><span class="plain-syntax">(</span><span class="reserved-syntax">symbol</span><span class="plain-syntax">)</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">symbol</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">symbol_name</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">symbol_kind</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="constant-syntax">CLASS_DEFINITION</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">symbol</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>The structure symbol is private to this section.</li></ul>
<p class="commentary firstcommentary"><a id="SP5"></a><b>&#167;5. </b></p>
<pre class="Preform-displayed-code all-displayed-code code-font">
<span class="Preform-function-syntax">&lt;declaration-line&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">new</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">unit</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;k-kind&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_1" class="named-paragraph-link"><span class="named-paragraph">Kind already exists error</span><span class="named-paragraph-number">5.1</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">new</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">unit</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">==&gt;</span><span class="Preform-plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_2" class="named-paragraph-link"><span class="named-paragraph">Create new unit</span><span class="named-paragraph-number">5.2</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">new</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">enum</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;k-kind&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_1" class="named-paragraph-link"><span class="named-paragraph">Kind already exists error</span><span class="named-paragraph-number">5.1</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">new</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">enum</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">==&gt;</span><span class="Preform-plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_3" class="named-paragraph-link"><span class="named-paragraph">Create new enum</span><span class="named-paragraph-number">5.3</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;k-kind&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">*</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;k-kind&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">=</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;k-kind&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_4" class="named-paragraph-link"><span class="named-paragraph">New arithmetic rule</span><span class="named-paragraph-number">5.4</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-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><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==&gt;</span><span class="Preform-plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_5" class="named-paragraph-link"><span class="named-paragraph">Symbol already exists error</span><span class="named-paragraph-number">5.5</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">=</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-kind&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_6" class="named-paragraph-link"><span class="named-paragraph">Create symbol</span><span class="named-paragraph-number">5.6</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">+</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_8" class="named-paragraph-link"><span class="named-paragraph">Show plus</span><span class="named-paragraph-number">5.8</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">-</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_9" class="named-paragraph-link"><span class="named-paragraph">Show minus</span><span class="named-paragraph-number">5.9</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">*</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_10" class="named-paragraph-link"><span class="named-paragraph">Show times</span><span class="named-paragraph-number">5.10</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">over</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_11" class="named-paragraph-link"><span class="named-paragraph">Show divide</span><span class="named-paragraph-number">5.11</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">%</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_12" class="named-paragraph-link"><span class="named-paragraph">Show remainder</span><span class="named-paragraph-number">5.12</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&gt;</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">to</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">the</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">nearest</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_13" class="named-paragraph-link"><span class="named-paragraph">Show approx</span><span class="named-paragraph-number">5.13</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">-</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_14" class="named-paragraph-link"><span class="named-paragraph">Show unary minus</span><span class="named-paragraph-number">5.14</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">square</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">root</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">of</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_15" class="named-paragraph-link"><span class="named-paragraph">Show square root</span><span class="named-paragraph-number">5.15</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">real</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">square</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">root</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">of</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_16" class="named-paragraph-link"><span class="named-paragraph">Show real square root</span><span class="named-paragraph-number">5.16</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">cube</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">root</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">of</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_17" class="named-paragraph-link"><span class="named-paragraph">Show cube root</span><span class="named-paragraph-number">5.17</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax">&lt;existing-symbol&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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_7" class="named-paragraph-link"><span class="named-paragraph">Show symbol</span><span class="named-paragraph-number">5.7</span></a></span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">which</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">varies</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"> { -, - }</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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_19" class="named-paragraph-link"><span class="named-paragraph">Fail with error</span><span class="named-paragraph-number">5.19</span></a></span>
<span class="Preform-function-syntax">&lt;existing-kind&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;k-kind&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"> { pass 1 }</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"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_18" class="named-paragraph-link"><span class="named-paragraph">No such kind error</span><span class="named-paragraph-number">5.18</span></a></span><span class="Preform-constant-syntax">;</span>
<span class="Preform-function-syntax">&lt;existing-symbol&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">{</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">parse_node</span><span class="Preform-plain-syntax"> *</span><span class="Preform-identifier-syntax">results</span><span class="Preform-plain-syntax"> = </span><a href="../lexicon-module/1-lxc.html#SP3" class="function-link"><span class="Preform-function-syntax">Lexicon::retrieve</span></a><span class="Preform-plain-syntax">(</span><span class="Preform-constant-syntax">SYMBOL_MC</span><span class="Preform-plain-syntax">, </span><span class="Preform-identifier-syntax">W</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-identifier-syntax">results</span><span class="Preform-plain-syntax">) {</span>
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">symbol</span><span class="Preform-plain-syntax"> *</span><span class="Preform-identifier-syntax">S</span><span class="Preform-plain-syntax"> = </span><span class="Preform-identifier-syntax">RETRIEVE_POINTER_symbol</span><span class="Preform-plain-syntax">(</span><a href="../lexicon-module/1-lxc.html#SP2" class="function-link"><span class="Preform-function-syntax">Lexicon::get_data</span></a><span class="Preform-plain-syntax">(</span><span class="Preform-identifier-syntax">Node::get_meaning</span><span class="Preform-plain-syntax">(</span><span class="Preform-identifier-syntax">results</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-identifier-syntax">S</span><span class="Preform-plain-syntax">) { ==&gt; { -, </span><span class="Preform-identifier-syntax">S</span><span class="Preform-plain-syntax"> }; </span><span class="Preform-reserved-syntax">return</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">TRUE</span><span class="Preform-plain-syntax">; }</span>
<span class="Preform-plain-syntax"> }</span>
<span class="Preform-plain-syntax"> ==&gt; { </span><span class="Preform-identifier-syntax">fail</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">nonterminal</span><span class="Preform-plain-syntax"> };</span>
<span class="Preform-plain-syntax">}</span>
</pre>
<ul class="endnotetexts"><li>This is <a href="../words-module/4-ap.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_1"></a><b>&#167;5.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Kind already exists error</span><span class="named-paragraph-number">5.1</span></span><span class="Preform-comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1];</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">PRINT</span><span class="plain-syntax">(</span><span class="string-syntax">"Kind already exists: '%u'\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> ==&gt; { </span><span class="identifier-syntax">fail</span><span class="plain-syntax"> }</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a> (twice).</li></ul>
<p class="commentary firstcommentary"><a id="SP5_2"></a><b>&#167;5.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Create new unit</span><span class="named-paragraph-number">5.2</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><a href="../kinds-module/2-knd.html#SP33" class="function-link"><span class="function-syntax">Kinds::new_base</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">syntax_tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">GET_RW</span><span class="plain-syntax">(</span><span class="function-syntax">&lt;declaration-line&gt;</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">), </span><span class="identifier-syntax">K_value</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="../kinds-module/2-uk.html#SP7" class="function-link"><span class="function-syntax">Kinds::Behaviour::convert_to_unit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">syntax_tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_3"></a><b>&#167;5.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Create new enum</span><span class="named-paragraph-number">5.3</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><a href="../kinds-module/2-knd.html#SP33" class="function-link"><span class="function-syntax">Kinds::new_base</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">syntax_tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">GET_RW</span><span class="plain-syntax">(</span><span class="function-syntax">&lt;declaration-line&gt;</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">), </span><span class="identifier-syntax">K_value</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="../kinds-module/2-uk.html#SP8" class="function-link"><span class="function-syntax">Kinds::Behaviour::convert_to_enumeration</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">syntax_tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_4"></a><b>&#167;5.4. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">New arithmetic rule</span><span class="named-paragraph-number">5.4</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K1</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *) </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1];</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K2</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *) </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[2];</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *) </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[3];</span>
<span class="plain-syntax"> </span><a href="../kinds-module/2-dmn.html#SP30" class="function-link"><span class="function-syntax">Kinds::Dimensions::make_unit_derivation</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K1</span><span class="plain-syntax">, </span><span class="identifier-syntax">K2</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_4_1" class="named-paragraph-link"><span class="named-paragraph">Show result</span><span class="named-paragraph-number">5.4.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_5"></a><b>&#167;5.5. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Symbol already exists error</span><span class="named-paragraph-number">5.5</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1];</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">PRINT</span><span class="plain-syntax">(</span><span class="string-syntax">"Symbol already exists: '%W'\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> ==&gt; { </span><span class="identifier-syntax">fail</span><span class="plain-syntax"> }</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_6"></a><b>&#167;5.6. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Create symbol</span><span class="named-paragraph-number">5.6</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1];</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">symbol</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">GET_RW</span><span class="plain-syntax">(</span><span class="function-syntax">&lt;declaration-line&gt;</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><a href="../lexicon-module/1-lxc.html#SP1" class="function-link"><span class="function-syntax">Lexicon::register</span></a><span class="plain-syntax">(</span><span class="constant-syntax">SYMBOL_MC</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">STORE_POINTER_symbol</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_4_1" class="named-paragraph-link"><span class="named-paragraph">Show result</span><span class="named-paragraph-number">5.4.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_7"></a><b>&#167;5.7. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show symbol</span><span class="named-paragraph-number">5.7</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1];</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_kind</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_4_1" class="named-paragraph-link"><span class="named-paragraph">Show result</span><span class="named-paragraph-number">5.4.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_8"></a><b>&#167;5.8. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show plus</span><span class="named-paragraph-number">5.8</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">PLUS_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_8_1" class="named-paragraph-link"><span class="named-paragraph">Show arithmetic</span><span class="named-paragraph-number">5.8.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_9"></a><b>&#167;5.9. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show minus</span><span class="named-paragraph-number">5.9</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">MINUS_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_8_1" class="named-paragraph-link"><span class="named-paragraph">Show arithmetic</span><span class="named-paragraph-number">5.8.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_10"></a><b>&#167;5.10. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show times</span><span class="named-paragraph-number">5.10</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">TIMES_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_8_1" class="named-paragraph-link"><span class="named-paragraph">Show arithmetic</span><span class="named-paragraph-number">5.8.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_11"></a><b>&#167;5.11. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show divide</span><span class="named-paragraph-number">5.11</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">DIVIDE_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_8_1" class="named-paragraph-link"><span class="named-paragraph">Show arithmetic</span><span class="named-paragraph-number">5.8.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_12"></a><b>&#167;5.12. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show remainder</span><span class="named-paragraph-number">5.12</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">REMAINDER_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_8_1" class="named-paragraph-link"><span class="named-paragraph">Show arithmetic</span><span class="named-paragraph-number">5.8.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_13"></a><b>&#167;5.13. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show approx</span><span class="named-paragraph-number">5.13</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">APPROXIMATION_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_8_1" class="named-paragraph-link"><span class="named-paragraph">Show arithmetic</span><span class="named-paragraph-number">5.8.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_8_1"></a><b>&#167;5.8.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show arithmetic</span><span class="named-paragraph-number">5.8.1</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1];</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[2];</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><a href="../kinds-module/2-dmn.html#SP40" class="function-link"><span class="function-syntax">Kinds::Dimensions::arithmetic_on_kinds</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S1</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">S2</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">op</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_4_1" class="named-paragraph-link"><span class="named-paragraph">Show result</span><span class="named-paragraph-number">5.4.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5_8">&#167;5.8</a>, <a href="1-dcl.html#SP5_9">&#167;5.9</a>, <a href="1-dcl.html#SP5_10">&#167;5.10</a>, <a href="1-dcl.html#SP5_11">&#167;5.11</a>, <a href="1-dcl.html#SP5_12">&#167;5.12</a>, <a href="1-dcl.html#SP5_13">&#167;5.13</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_14"></a><b>&#167;5.14. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show unary minus</span><span class="named-paragraph-number">5.14</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">UNARY_MINUS_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_14_1" class="named-paragraph-link"><span class="named-paragraph">Show unary arithmetic</span><span class="named-paragraph-number">5.14.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_15"></a><b>&#167;5.15. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show square root</span><span class="named-paragraph-number">5.15</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">ROOT_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_14_1" class="named-paragraph-link"><span class="named-paragraph">Show unary arithmetic</span><span class="named-paragraph-number">5.14.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_16"></a><b>&#167;5.16. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show real square root</span><span class="named-paragraph-number">5.16</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">REALROOT_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_14_1" class="named-paragraph-link"><span class="named-paragraph">Show unary arithmetic</span><span class="named-paragraph-number">5.14.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_17"></a><b>&#167;5.17. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show cube root</span><span class="named-paragraph-number">5.17</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">op</span><span class="plain-syntax"> = </span><span class="constant-syntax">CUBEROOT_OPERATION</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_14_1" class="named-paragraph-link"><span class="named-paragraph">Show unary arithmetic</span><span class="named-paragraph-number">5.14.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_14_1"></a><b>&#167;5.14.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show unary arithmetic</span><span class="named-paragraph-number">5.14.1</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1];</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><a href="../kinds-module/2-dmn.html#SP40" class="function-link"><span class="function-syntax">Kinds::Dimensions::arithmetic_on_kinds</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S1</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">op</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="1-dcl.html#SP5_4_1" class="named-paragraph-link"><span class="named-paragraph">Show result</span><span class="named-paragraph-number">5.4.1</span></a></span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5_14">&#167;5.14</a>, <a href="1-dcl.html#SP5_15">&#167;5.15</a>, <a href="1-dcl.html#SP5_16">&#167;5.16</a>, <a href="1-dcl.html#SP5_17">&#167;5.17</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_4_1"></a><b>&#167;5.4.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Show result</span><span class="named-paragraph-number">5.4.1</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">PRINT</span><span class="plain-syntax">(</span><span class="string-syntax">"'%W': %u\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5_4">&#167;5.4</a>, <a href="1-dcl.html#SP5_6">&#167;5.6</a>, <a href="1-dcl.html#SP5_7">&#167;5.7</a>, <a href="1-dcl.html#SP5_8_1">&#167;5.8.1</a>, <a href="1-dcl.html#SP5_14_1">&#167;5.14.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_18"></a><b>&#167;5.18. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">No such kind error</span><span class="named-paragraph-number">5.18</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">PRINT</span><span class="plain-syntax">(</span><span class="string-syntax">"No such kind as '%W'\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> ==&gt; { </span><span class="identifier-syntax">fail</span><span class="plain-syntax"> }</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_19"></a><b>&#167;5.19. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Fail with error</span><span class="named-paragraph-number">5.19</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">PRINT</span><span class="plain-syntax">(</span><span class="string-syntax">"Declaration not understood: '%W'\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> ==&gt; { </span><span class="identifier-syntax">fail</span><span class="plain-syntax"> }</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="1-dcl.html#SP5">&#167;5</a>.</li></ul>
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