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Revision 2, 0.6 KB
(checked in by pmoura, 7 years ago)
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Initial revision
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Property svn:eol-style set to
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| 1 | |
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| 2 | :- object(varlist, |
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| 3 | extends(list)). |
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| 4 | |
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| 5 | |
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| 6 | :- info([ |
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| 7 | version is 1.0, |
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| 8 | authors is 'Paulo Moura', |
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| 9 | date is 2000/7/24, |
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| 10 | comment is 'List of variables predicates.']). |
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| 11 | |
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| 12 | |
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| 13 | member(Element, [Head| _]) :- |
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| 14 | Element == Head. |
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| 15 | |
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| 16 | member(Element, [_| Tail]) :- |
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| 17 | member(Element, Tail). |
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| 18 | |
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| 19 | |
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| 20 | memberchk(Element, [Head| Tail]) :- |
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| 21 | Element == Head -> |
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| 22 | true |
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| 23 | ; |
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| 24 | memberchk(Element, Tail). |
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| 25 | |
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| 26 | |
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| 27 | prefix([], _). |
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| 28 | |
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| 29 | prefix([Head1| Tail1], [Head2| Tail2]) :- |
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| 30 | Head1 == Head2, |
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| 31 | prefix(Tail1, Tail2). |
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| 32 | |
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| 33 | |
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| 34 | valid(List) :- |
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| 35 | nonvar(List), |
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| 36 | \+ \+ valid2(List). |
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| 37 | |
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| 38 | |
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| 39 | valid2([]). |
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| 40 | |
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| 41 | valid2([Head| Tail]) :- |
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| 42 | var(Head), |
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| 43 | valid2(Tail). |
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| 44 | |
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| 45 | |
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| 46 | :- end_object. |
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