39 lines
808 B
Prolog
39 lines
808 B
Prolog
:- module(test_on_predicates, []).
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:- dynamic(p/2).
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:- dynamic(p/3).
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:- dynamic(q/1).
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p(_, a).
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p(b, _).
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test_queries_on_predicates :-
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findall(Y, p(x, Y), [a]),
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findall(X, p(X, a), [_,b]),
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findall(X, p(b, X), [a,_]),
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findall(X, p(X, X), [a,b]),
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p(b, a),
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\+ p(a, b),
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retract(p(_,a)),
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retract(p(b,_)),
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assertz(p(_, _,a)),
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assertz(p(_,a,_)),
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assertz(p(_,_,a)),
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findall(X, p(c,d,X), [a,a]),
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findall(X, p(a,a,a), [a,a,a]),
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\+ p(b,c,d),
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findall(., retract(p(_,_,_)), _),
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assertz(p(_, a)),
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assertz(q(z)),
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findall(Y, p(_,Y), [a]),
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p(x,a),
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p(_,a),
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\+ p(_,b),
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assertz((p(X, Y) :- q(Z), p(X, X))),
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once(p(X,b)),
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retract((p(X, Y) :- q(Z), p(X, X))),
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retract(q(z)).
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:- initialization(test_queries_on_predicates).
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