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48 lines
964 B
Mathematica
48 lines
964 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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%
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% This test case checks the correctness of the code that performs
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% the fixpoint loop returning answers to consumers. The fixpoint
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% computation has to repeatedly switch from one consumer to the
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% other to obtain all answers for p/1.
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:- module seq3.
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:- interface.
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:- import_module io.
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:- pred main(io::di, io::uo) is det.
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:- implementation.
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:- import_module int.
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:- import_module list.
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:- import_module solutions.
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:- pragma require_feature_set([memo]).
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main(!IO) :-
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solutions(p, Solns),
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io.write(Solns, !IO),
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io.write_string("\n", !IO).
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:- pred p(int).
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:- mode p(out) is nondet.
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:- pragma minimal_model(p/1).
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p(X) :-
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(
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X = 1
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;
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p(Y),
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X = 2 * Y,
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X < 20
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;
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p(Y),
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X = 3 * Y,
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X < 20
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).
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