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git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@211 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
82 lines
2.0 KiB
HTML
82 lines
2.0 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>::/2</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_object2">::/2</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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Object::Predicate
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(Object1, Object2, ...)::Predicate
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(Object1; Object2; ...)::Predicate
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Object::(Predicate1, Predicate2, ...)
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Object::(Predicate1; Predicate2; ...)
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</pre>
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<p>
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Sends a message to an object. The message argument must match a public predicate of the receiver object. We can also send the same message to a set of objects or a set of messages to the same object. The "<CODE>,</CODE>" and "<CODE>;</CODE>" in the list have the usual Prolog meaning.
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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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+receivers::+messages
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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>Either Object or 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 declared protected:</dt>
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<dd><code>permission_error(access, protected_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>Object does not exist:</dt>
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<dd><code>existence_error(object, Object)</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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| ?- list::member(X, [1, 2, 3]).
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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="../methods/after3.html">Previous</a> | <a href="to_self1.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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