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32 lines
489 B
Mathematica
32 lines
489 B
Mathematica
:- module same_length_2.
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:- interface.
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:- import_module list.
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:- mode my_input_list_skel :: list_skel -> list_skel.
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:- mode my_output_list_skel :: free -> list_skel.
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:- mode my_list_skel_output :: list_skel -> ground.
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:- pred p is semidet.
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:- pred p2(list(T)::my_output_list_skel) is nondet.
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:- implementation.
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:- pred q(list(T)::my_input_list_skel).
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:- pred r(list(T)::my_output_list_skel).
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q(_X) :- q([]).
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r(X) :- r(X).
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p :-
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r(X),
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q(X).
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p2(X) :-
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r(X),
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q(X)
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;
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r(X),
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q(X).
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