6b4bde14e1
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1903 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
61 lines
1.3 KiB
Plaintext
61 lines
1.3 KiB
Plaintext
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:- object(object,
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imports(category)).
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:- info([
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version is 3.0,
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author is 'Paulo Moura',
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date is 2007/06/11,
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comment is 'Example object for benchmarking library predicate calls and imported category predicate calls.']).
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:- public(length/2).
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length(List, Length) :-
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length(List, 0, Length).
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length([], Length, Length).
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length([_| Tail], Acc, Length) :-
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Acc2 is Acc + 1,
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length(Tail, Acc2, Length).
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:- public(ctg_self/0).
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% call an imported category predicate by sending a message to self;
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% performance will depend on the distance between "self" and "this"
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% (always uses dynamic binding)
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ctg_self :-
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::ctg_pred.
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:- public(ctg_direct/0).
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% call an imported category predicate directly by using the :/1 control construct;
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% (static binding may be used, depending on how the category is compiled)
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ctg_direct :-
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:ctg_pred.
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:- end_object.
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:- object(descendant,
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extends(object)).
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:- info([
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version is 1.0,
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author is 'Paulo Moura',
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date is 2007/04/17,
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comment is 'Example object used for simulating a small hierarchy.']).
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:- end_object.
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:- object(leaf,
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extends(descendant)).
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:- info([
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version is 1.0,
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author is 'Paulo Moura',
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date is 2007/04/17,
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comment is 'Example object used for simulating a small hierarchy.']).
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:- end_object.
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