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| 1 | ================================================================ |
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| 2 | Logtalk - Open source object-oriented logic programming language |
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| 3 | Release 2.35.0 |
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| 4 | |
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| 5 | Copyright (c) 1998-2009 Paulo Moura. All Rights Reserved. |
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| 6 | Logtalk is free software. You can redistribute it and/or modify |
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| 7 | it under the terms of the "Artistic License 2.0" as published by |
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| 8 | The Perl Foundation. Consult the "LICENSE.txt" file for details. |
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| 9 | ================================================================ |
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| 10 | |
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| 11 | |
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| 12 | To load this example and for sample queries, please see the SCRIPT.txt file. |
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| 13 | |
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| 14 | This example shows the use of meta-predicates in Logtalk. Meta-predicates are |
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| 15 | predicates whose head contains arguments that will be called as goals in the |
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| 16 | body of the predicate definition. |
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| 17 | |
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| 18 | This example defines the following objects: |
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| 19 | |
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| 20 | sort(_) |
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| 21 | this is a parametric object containing a method that implements the |
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| 22 | quicksort sorting algorithm; the parameter is interpreted as the type |
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| 23 | of the elements being sorted |
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| 24 | |
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| 25 | tracer |
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| 26 | this object implements a meta-predicate that is used by sort(_) to |
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| 27 | trace the sorting algorithm steps |
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| 28 | |
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| 29 | metapreds |
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| 30 | descendant |
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| 31 | test |
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| 32 | objects used for illustrating the use of clusures as meta-arguments |
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| 33 | |
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| 34 | predicates |
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| 35 | object defining some predicates for testing meta-predicates defined |
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| 36 | in the Logtalk library |
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