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git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@211 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
65 lines
1.2 KiB
HTML
65 lines
1.2 KiB
HTML
<!doctype html public "-//W3C//DTD HTML 4.01//EN"
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"http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<title>retractall/1</title>
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<link rel=stylesheet href="../../styles.css" type="text/css">
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</head>
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<body>
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<hr />
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<h2><code><a class="back" title="Return to index" href="../index.html#retractall1">retractall/1</a></code></h2>
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<hr />
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<h4>Description</h4>
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<blockquote>
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<pre>
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retractall(Head)
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</pre>
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<p>
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Logtalk adds this built-in predicate, with the usual definition, to a Prolog compiler if it is not already defined.
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</p>
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</blockquote>
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<h4>Template and modes</h4>
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<blockquote>
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<pre>
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retractall(+callable)
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</pre>
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</blockquote>
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<h4>Errors</h4>
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<blockquote>
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<dl>
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<dt>Head is not a callable term:</dt>
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<dd><code>type_error(callable, Head)</code></dd>
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</dl>
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</blockquote>
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<h4>Examples</h4>
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<blockquote>
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<pre>
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| ?- retractall(foo(_)).
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</pre>
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</blockquote>
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<hr />
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<p class="center">
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<strong><a href="logtalk_version3.html">Previous</a> | <a href="../methods/parameter2.html">Next</a> | <a href="../index.html">Table of Contents</a> | <a href="../../bibliography.html">Bibliography</a> | <a href="../../glossary.html">Glossary</a></strong>
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</p>
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<p class="center">
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Last updated on: October 21, 2001
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</p>
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<hr />
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</body>
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</html>
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