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2001-06-06 21:07:01 +01:00
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<head>
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<title>instantiates_class/2-3</title>
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2002-08-01 00:34:42 +01:00
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2001-06-06 21:07:01 +01:00
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<h2><code><a class="back" title="Return to index" href="../index.html#instantiates_class2_3">instantiates_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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instantiates_class(Instance, Class)
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instantiates_class(Instance, Class, 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 instantiates 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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instantiates_class(?object_identifier, ?object_identifier)
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2001-12-05 23:57:48 +00:00
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instantiates_class(?object_identifier, ?object_identifier, ?scope)
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</pre>
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</blockquote>
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2001-12-05 23:57:48 +00:00
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<h4>Errors</h4>
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<blockquote>
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<dl>
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<dt>Instance is neither a variable nor a valid object identifier:</dt>
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<dd><code>type_error(object_identifier, Instance)</code></dd>
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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>Scope is neither a variable nor a valid entity scope:</dt>
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2001-12-05 23:57:48 +00:00
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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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| ?- instantiates_class(water_jug, state_space).
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| ?- instantiates_class(Space, 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="imports_category2_3.html">Previous</a> | <a href="specializes_class2_3.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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2002-08-01 00:34:42 +01:00
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Last updated on: July 29, 2002
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