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132 lines
2.6 KiB
Mathematica
132 lines
2.6 KiB
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 is a copy of tests/general/complex_failure, and tests
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% whether this test case can be compiled with --use-trail; this caused
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% a compiler abort with the 21 September, 1998 version of the compiler.
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%
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% Unfortunately, we cannot just specify --use-trail for complex_failure
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% in tests/general, since that would cause a link error in the usual case
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% that the runtime being linked with is not in a trailing grade.
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:- module complex_failure.
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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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main(!IO) :-
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solutions(p1, Xs1),
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print_list(Xs1, !IO),
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solutions(p2, Xs2),
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print_list(Xs2, !IO),
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solutions(p3, Xs3),
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print_list(Xs3, !IO).
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:- pred p1(int::out) is nondet.
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p1(X) :-
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p(1, X).
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:- pred p2(int::out) is nondet.
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p2(X) :-
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p(2, X).
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:- pred p3(int::out) is nondet.
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p3(X) :-
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p(3, X).
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:- pred p(int::in, int::out) is nondet.
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p(A, X) :-
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% The first if-then-else can hijack the redoip/redofr slots
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% of p's frame.
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( if
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some [B] ( q(A, B) ; r(A, B) )
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then
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C = B * 10
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% s(B, C)
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else
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C = A * 10
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% s(A, C)
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),
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% The second if-then-else cannot hijack the redoip/redofr slots
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% of p's frame, since this may not be (and usually won't be)
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% on top when execution gets here.
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( if
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some [D] ( q(C, D) ; r(C, D) )
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then
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s(D, X)
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else
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s(C, X)
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).
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:- pred q(int::in, int::out) is nondet.
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q(1, 15).
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q(1, 16).
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q(2, 25).
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q(2, 26).
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q(3, 35).
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q(150, 660).
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q(161, 661).
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q(281, 662).
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:- pred r(int::in, int::out) is nondet.
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r(1, 18).
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r(1, 19).
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r(2, 28).
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r(2, 29).
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r(3, 38).
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r(260, 690).
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r(370, 698).
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:- pred s(int::in, int::out) is nondet.
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s(F, G) :-
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F < 695,
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(
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G = 10 * F
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;
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G = 10 * F + 1
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).
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:- pred print_list(list(int)::in, io::di, io::uo) is det.
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print_list(Xs, !IO) :-
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(
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Xs = [],
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io.write_string("[]\n", !IO)
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;
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Xs = [_ | _],
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io.write_string("[", !IO),
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print_list_2(Xs,!IO),
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io.write_string("]\n", !IO)
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).
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:- pred print_list_2(list(int)::in, io::di, io::uo) is det.
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print_list_2([], !IO).
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print_list_2([X | Xs], !IO) :-
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io.write_int(X, !IO),
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(
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Xs = []
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;
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Xs = [_ | _],
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io.write_string(", ", !IO),
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print_list_2(Xs, !IO)
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).
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