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75 lines
2.5 KiB
HTML
75 lines
2.5 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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<head>
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<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
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<title>Logtalk control construct: ^^/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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<a href="../../index.html">contents</a> > <a href="../index.html">reference manual</a> > <a href="../index.html#constructs">control constructs</a>
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</div>
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<h2><code>^^/1</code></h2>
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<h4>Description</h4>
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<blockquote>
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<pre>^^Predicate</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>^^+message</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>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>init :-
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assertz(counter(0)),
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^^init.</pre>
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</blockquote>
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<a href="to_self1.html">previous</a> | <a href="../../glossary.html">glossary</a> | <a href="../index.html#constructs">next</a>
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Copyright © <a href="mailto:pmoura@logtalk.org">Paulo Moura</a> — <a href="http://www.logtalk.org">Logtalk.org</a>
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<p><span class="bleft"><a href="http://validator.w3.org/check/referer">XHTML</a> + <a href="http://jigsaw.w3.org/css-validator/check/referer">CSS</a></span><span class="bright">Last updated on: December 23, 2003</span></p>
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