mirror of
https://github.com/Mercury-Language/mercury.git
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1f6d83692a
tests/hard_coded/*.m:
Update programming style, unless doing so would change
the meaning of the test, in particular:
- use '.' as a module qualifier in place of '__'
- use {write,print}_line where appropriate
- use if-then-else in place of C -> T ; E
- use state variables in place of DCGs
tests/hard_coded/dir_test.m:
Document what the expected outputs correspond to.
Use a uniform module qualifier in the output.
tests/hard_coded/dir_test.exp*:
Conform to the above change.
130 lines
3.7 KiB
Mathematica
130 lines
3.7 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module user_compare.
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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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main(!IO) :-
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compare(Result, foo(1), foo(2)),
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io.write_line(Result, !IO),
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( if unify(foo(1), foo(1)) then
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io.write_string("succeeded\n", !IO)
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else
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io.write_string("failed\n", !IO)
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),
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( if foreign(1) = foreign(1) then
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io.write_string("succeeded\n", !IO)
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else
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io.write_string("failed\n", !IO)
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),
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( if foreign(2) = foreign(3) then
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io.write_string("failed\n", !IO)
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else
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io.write_string("succeeded\n", !IO)
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),
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compare(Result2, foreign(3), foreign(2)),
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io.write_line(Result2, !IO).
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:- type foo
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---> foo(int)
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where comparison is compare_foo.
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% Reverse the comparison of the integers.
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%
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:- pred compare_foo(comparison_result::uo, foo::in, foo::in) is det.
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compare_foo(Res, Foo1, Foo2) :-
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Res1 = promise_only_solution(
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(pred(Res0::uo) is cc_multi :-
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Foo1 = foo(Int1),
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Foo2 = foo(Int2),
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compare(Res0, Int2, Int1)
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)
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),
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Res = Res1.
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:- type foreign.
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:- pragma foreign_type(c, foreign, "int") where
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equality is foreign_equals, comparison is foreign_compare.
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:- pragma foreign_type("C#", foreign, "int") where
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equality is foreign_equals, comparison is foreign_compare.
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:- pragma foreign_type("Java", foreign, "Integer") where
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equality is foreign_equals, comparison is foreign_compare.
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:- pred foreign_equals(foreign::in, foreign::in) is semidet.
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:- pragma foreign_proc(c,
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foreign_equals(Foreign1::in, Foreign2::in),
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[will_not_call_mercury, promise_pure],
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"
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SUCCESS_INDICATOR = (Foreign1 == Foreign2);
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").
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:- pragma foreign_proc("C#",
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foreign_equals(Foreign1::in, Foreign2::in),
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[will_not_call_mercury, promise_pure],
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"
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SUCCESS_INDICATOR = (Foreign1 == Foreign2);
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").
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:- pragma foreign_proc("Java",
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foreign_equals(Foreign1::in, Foreign2::in),
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[will_not_call_mercury, promise_pure],
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"
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SUCCESS_INDICATOR = (Foreign1 == Foreign2);
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").
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:- pred foreign_compare `with_type` compare(foreign) `with_inst` compare.
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foreign_compare(Result, Foreign1, Foreign2) :-
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foreign_compare_2(Result0, Foreign1, Foreign2),
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Result = ( Result0 < 0 -> (<) ; Result0 = 0 -> (=) ; (>) ).
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% Reverse the comparison of the integers.
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%
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:- pred foreign_compare_2(int::out, foreign::in, foreign::in) is det.
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:- pragma foreign_proc(c,
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foreign_compare_2(Result::out, Foreign1::in, Foreign2::in),
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[will_not_call_mercury, promise_pure],
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"
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Result = (Foreign1 < Foreign2 ? 1 : (Foreign1 == Foreign2 ? 0 : -1));
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").
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:- pragma foreign_proc("C#",
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foreign_compare_2(Result::out, Foreign1::in, Foreign2::in),
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[will_not_call_mercury, promise_pure],
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"
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Result = (Foreign1 < Foreign2 ? 1 : (Foreign1 == Foreign2 ? 0 : -1));
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").
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:- pragma foreign_proc("Java",
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foreign_compare_2(Result::out, Foreign1::in, Foreign2::in),
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[will_not_call_mercury, promise_pure],
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"
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Result = (Foreign1 < Foreign2 ? 1 : (Foreign1 == Foreign2 ? 0 : -1));
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").
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:- func foreign(int) = foreign.
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:- pragma foreign_proc(c,
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foreign(Int::in) = (Foreign::out),
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[will_not_call_mercury, promise_pure],
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"
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Foreign = Int;
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").
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:- pragma foreign_proc("C#",
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foreign(Int::in) = (Foreign::out),
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[will_not_call_mercury, promise_pure],
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"
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Foreign = Int;
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").
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:- pragma foreign_proc("Java",
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foreign(Int::in) = (Foreign::out),
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[will_not_call_mercury, promise_pure],
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"
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Foreign = Int;
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").
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