42aabce1bb
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1973 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
24 lines
870 B
Plaintext
24 lines
870 B
Plaintext
================================================================
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Logtalk - Open source object-oriented logic programming language
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Release 2.30.7
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Copyright (c) 1998-2007 Paulo Moura. All Rights Reserved.
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================================================================
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To load this example and for sample queries, please see the SCRIPT file.
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This example shows the use of meta-predicates in Logtalk. Meta-predicates are
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predicates whose head contains arguments that will be called as goals in the
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body of the predicate definition.
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This example defines two objects:
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sort(_)
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this is a parametric object containing a method that implements the
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quicksort sorting algorithm; the parameter is interpreted as the type
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of the elements being sorted
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tracer
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this object implements a meta-predicate that is used by sort(_) to
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trace the sorting algorithm steps |