23 lines
478 B
Plaintext
23 lines
478 B
Plaintext
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:- object(proof_tree).
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:- info([
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version is 1.0,
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date is 2004/5/2,
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author is 'Paulo Moura',
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comment is 'Meta-interpreter for pure Prolog.']).
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:- public(solve/2).
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:- mode(solve(+goal, -tree), zero_or_more).
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:- info(solve/2, [
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comment is 'Constructs a proof tree for a goal.',
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argnames is ['Goal', 'Tree']]).
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solve(true, true).
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solve((A, B), (PA, PB)) :-
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!, solve(A, PA), solve(B, PB).
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solve(A, (A :- PB)) :-
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clause(A, B), solve(B, PB).
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:- end_object.
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