73 lines
1.9 KiB
HTML
73 lines
1.9 KiB
HTML
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<!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>^^/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#to_super1">^^/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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^^Predicate
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</pre>
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<p>
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Calls a redefined/inherited definition for a message. Normally only used in the body of a predicate definition for the message. Predicate should match a public or protected predicate of <a class="glossary" title="Go to glossary definition" href="../../glossary.html#self">self</a> or be within the scope of <a class="glossary" title="Go to glossary definition" href="../../glossary.html#this">this</a>.
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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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^^+message
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</pre>
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</blockquote>
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<h3>Errors</h3>
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<blockquote>
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<dl>
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<dt>Predicate is a variable:</dt>
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<dd><code>instantiation_error</code></dd>
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<dt>Predicate is declared private:</dt>
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<dd><code>permission_error(access, private_predicate, Predicate)</code></dd>
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<dt>Predicate is not declared:</dt>
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<dd><code>existence_error(predicate_declaration, Predicate)</code></dd>
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<dt>Container of the inherited predicate definition is the same object that contains the <code>^^/1</code> call:</dt>
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<dd><code>endless_loop(Predicate)</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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init :-
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assertz(counter(0)),
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^^init.
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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="to_self1.html">Previous</a> | <a href="external1.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: July 4, 2000
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</p>
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<hr />
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</body>
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</html>
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