Files
mercury/tests/general/semidet_lambda.m
Zoltan Somogyi ecb5e4a9e6 Update the style of many test cases.
tests/declarative_debugger/*.m:
tests/exceptions/*.m:
tests/general/*.m:
tests/grade_subdirs/*.m:
tests/purity/*.m:
tests/submodules/*.m:
tests/typeclasses/*.m:
    Update programming style.

tests/declarative_debugger/*.inp:
    Update line numbers in breakpoint commands.
tests/declarative_debugger/*.exp:
    Update expected line numbers.

tests/exceptions/Mercury.options:
tests/general/Mercury.options:
    Disable some warnings that are irrelevant to the test.
2021-07-25 23:26:17 +10:00

36 lines
777 B
Mathematica

%---------------------------------------------------------------------------%
% vim: ts=4 sw=4 et ft=mercury
%---------------------------------------------------------------------------%
%
% This module tests the case of calling a semidet pred in
% a nondet lambda expression; Mercury-0.4 got this case wrong.
:- module semidet_lambda.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
:- implementation.
:- import_module list.
:- import_module solutions.
main(!IO) :-
q(Y),
( if Y = [Z] then
io.write_int(Z, !IO),
io.nl(!IO)
else
io.write_string("Hello, world\n", !IO)
).
:- pred p(int::out) is semidet.
p(42).
:- pred q(list(int)::out) is det.
q(Y) :-
solutions((pred(X::out) is nondet :- p(X)), Y).