Files
mercury/tests/hard_coded/quantifier.m
Julien Fischer 1f6d83692a Update programming style in tests/hard_coded.
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.
2021-01-07 13:58:12 +11:00

40 lines
799 B
Mathematica

%---------------------------------------------------------------------------%
% vim: ts=4 sw=4 et ft=mercury
%---------------------------------------------------------------------------%
%
:- module quantifier.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
:- implementation.
:- import_module list.
:- import_module int.
:- pred sum(list(int), int).
:- mode sum(in, out) is det.
sum([], 0).
sum([X | L], X + N1) :-
sum(L, N1).
:- pred foo(pred(int)).
:- mode foo(free >> (pred(out) is det)) is det.
foo(sum([1, 2, 3])).
main(!IO) :-
( if
P = (pred(X :: out) is det :- X = 6),
foo(Q),
all [X] (call(P, X) <=> call(Q, X))
then
io.print_line("equivalent", !IO)
else
io.print_line("not equivalent", !IO)
).