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30 lines
564 B
Mathematica
30 lines
564 B
Mathematica
% This module tests the case of calling a semidet pred in
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% a nondet lambda expression; Mercury-0.4 got this case wrong.
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:- module semidet_pred_in_nondet_lambda.
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:- interface.
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:- import_module io.
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:- pred main(io__state::di, io__state::uo) is det.
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:- implementation.
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:- import_module list, std_util.
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main -->
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{ q(Y) },
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( { Y = [Z] } ->
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io__write_int(Z),
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io__write_string("\n")
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;
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io__write_string("Hello, world\n")
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).
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:- pred p(int::out) is semidet.
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p(42).
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:- pred q(list(int)::out) is det.
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q(Y) :-
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solutions(lambda([X::out] is nondet,p(X)), Y).
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