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75 lines
1.8 KiB
HTML
75 lines
1.8 KiB
HTML
<!doctype html public "-//W3C//DTD HTML 4.01//EN"
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<title>specializes_class/2-3</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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<h2><code><a class="back" title="Return to index" href="../index.html#specializes_class2_3">specializes_class/2-3</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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specializes_class(Class, Superclass)
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specializes_class(Class, Superclass, Scope)
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</pre>
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<p>
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Enumerates, by backtracking, all pairs of objects such that the first one specializes the second.
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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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specializes_class(?object_identifier, ?object_identifier)
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specializes_class(?object_identifier, ?object_identifier, ?scope)
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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>Class is neither a variable nor a valid object identifier:</dt>
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<dd><code>type_error(object_identifier, Class)</code></dd>
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<dt>Superclass is neither a variable nor a valid object identifier:</dt>
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<dd><code>type_error(object_identifier, Superclass)</code></dd>
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<dt>Scope is neither a variable nor a valid entity scope:</dt>
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<dd><code>type_error(scope, Scope)</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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| ?- specializes_class(Subclass, state_space).
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| ?- specializes_class(Subclass, state_space, public).
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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="instantiates_class2_3.html">Previous</a> | <a href="abolish_events5.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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</body>
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