mirror of
https://github.com/Mercury-Language/mercury.git
synced 2026-04-20 20:03:44 +00:00
59 lines
1.5 KiB
Mathematica
59 lines
1.5 KiB
Mathematica
%---------------------------------------------------------------------------%
|
|
% vim: ts=4 sw=4 et ft=mercury
|
|
%---------------------------------------------------------------------------%
|
|
%
|
|
% Construction of a partially instantiated value involving a direct argument
|
|
% functor did not produce any code, causing incorrectly behaviour at run-time
|
|
% if the value was deconstructed.
|
|
%
|
|
|
|
:- module direct_arg_partial_inst2.
|
|
:- interface.
|
|
|
|
:- import_module io.
|
|
|
|
:- pred main(io::di, io::uo) is det.
|
|
|
|
%---------------------------------------------------------------------------%
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- implementation.
|
|
|
|
:- type struct
|
|
---> struct(int, int, int, int, int).
|
|
|
|
:- type fruit
|
|
---> apple(struct) % direct arg functor
|
|
; orange(struct). % direct arg functor
|
|
|
|
:- inst fruit
|
|
---> apple(free)
|
|
; orange(free).
|
|
|
|
:- pred mk_apple(fruit::out(fruit)) is det.
|
|
:- pragma no_inline(mk_apple/1).
|
|
|
|
mk_apple(apple(_)).
|
|
|
|
:- pred mk_orange(fruit::out(fruit)) is det.
|
|
:- pragma no_inline(mk_orange/1).
|
|
|
|
mk_orange(orange(_)).
|
|
|
|
:- pred fill(struct::in, fruit::in(fruit), fruit::out) is det.
|
|
:- pragma no_inline(fill/3).
|
|
|
|
fill(Struct, apple(_), apple(Struct)).
|
|
fill(Struct, orange(_), orange(Struct)).
|
|
|
|
main(!IO) :-
|
|
mk_apple(X0),
|
|
fill(struct(1, 2, 3, 4, 5), X0, X),
|
|
io.write(X, !IO),
|
|
io.nl(!IO),
|
|
|
|
mk_orange(Y0),
|
|
fill(struct(1, 2, 3, 4, 5), Y0, Y),
|
|
io.write(Y, !IO),
|
|
io.nl(!IO).
|