Files
mercury/tests/purity/impure_pred_t1_fixed3.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

46 lines
1021 B
Mathematica

%---------------------------------------------------------------------------%
% vim: ts=4 sw=4 et ft=mercury
%---------------------------------------------------------------------------%
:- module impure_pred_t1_fixed3.
:- interface.
:- import_module io.
:- impure pred main(io::di, io::uo) is det.
:- implementation.
:- import_module int.
:- import_module require.
:- import_module list.
:- type foo
---> foo(impure pred(int, int)).
main(!IO) :-
Y = foo(get_counter),
impure main2(Y, !IO).
:- impure pred main2(foo::in(bound(foo(pred(in, out) is det))),
io::di, io::uo) is det.
main2(Y, !IO) :-
Y = foo(X),
impure X(4, Z),
io.print("X = ", !IO),
io.print_line(Z, !IO).
:- pragma foreign_decl("C", "extern MR_Integer counter;").
:- pragma foreign_code("C", "MR_Integer counter = 0;").
:- impure pred get_counter(int::in, int::out) is det.
get_counter(X, X).
:- pragma foreign_proc("C",
get_counter(Y::in, X::out),
[will_not_call_mercury],
"
X = counter + Y;
").