Files
mercury/tests/declarative_debugger/higher_order.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

29 lines
625 B
Mathematica

%---------------------------------------------------------------------------%
% vim: ts=4 sw=4 et ft=mercury
%---------------------------------------------------------------------------%
:- module higher_order.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
:- implementation.
:- import_module int.
main(!IO) :-
p(3, Y),
io.write_int(Y, !IO),
io.nl(!IO).
:- pred p(int::in, int::out) is det.
p(X, Y) :-
C = (pred(A::in, B::out) is det :- B = A * A),
q(C, X, Y).
:- pred q(pred(int, int)::in(pred(in, out) is det), int::in, int::out) is det.
q(C, X, Y) :-
C(X * X, Y).