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Revision 2, 1.2 KB
(checked in by pmoura, 7 years ago)
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| 2 | :- protocol(metap). |
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| 3 | |
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| 4 | |
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| 5 | :- info([ |
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| 6 | version is 2, |
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| 7 | date is 2000/7/24, |
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| 8 | authors is 'Paulo Moura', |
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| 9 | comment is 'Useful meta-predicates protocol.']). |
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| 10 | |
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| 11 | |
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| 12 | :- public(apply/2). |
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| 13 | |
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| 14 | :- mode(apply(+callable, +list), zero_or_more). |
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| 15 | |
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| 16 | :- info(apply/2, [ |
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| 17 | comment is 'Applies a predicate to list of arguments.', |
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| 18 | argnames is ['Predicate', 'List']]). |
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| 19 | |
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| 20 | |
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| 21 | :- public(callable/1). |
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| 22 | |
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| 23 | :- mode(callable(@term), zero_or_one). |
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| 24 | |
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| 25 | :- info(callable/1, [ |
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| 26 | comment is 'True if the argument can be called as a goal.', |
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| 27 | argnames is ['Term']]). |
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| 28 | |
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| 29 | |
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| 30 | :- public(filter/3). |
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| 31 | |
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| 32 | :- mode(filter(+callable, +list, -list), one). |
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| 33 | |
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| 34 | :- info(filter/3, [ |
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| 35 | comment is 'Returns a list of all list elements that satisfy a predicate using apply/2.', |
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| 36 | argnames is ['Predicate', 'In', 'Out']]). |
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| 37 | |
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| 38 | |
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| 39 | :- public(map/3). |
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| 40 | |
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| 41 | :- mode(map(+callable, ?list, ?list), zero_or_more). |
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| 42 | |
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| 43 | :- info(map/3, [ |
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| 44 | comment is 'Maps a predicate over a list of elements using apply/2.', |
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| 45 | argnames is ['Predicate', 'In', 'Out']]). |
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| 46 | |
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| 47 | |
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| 48 | :- public(succeeds/2). |
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| 49 | |
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| 50 | :- mode(succeeds(+callable, +list), zero_or_more). |
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| 51 | |
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| 52 | :- info(succeeds/2, [ |
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| 53 | comment is 'True if the predicate succeeds for each list element using apply/2.', |
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| 54 | argnames is ['Predicate', 'List']]). |
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| 55 | |
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| 56 | |
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| 57 | :- end_protocol. |
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