mirror of
https://github.com/Mercury-Language/mercury.git
synced 2026-04-15 17:33:38 +00:00
54 lines
1.2 KiB
Mathematica
54 lines
1.2 KiB
Mathematica
%---------------------------------------------------------------------------%
|
|
% vim: ts=4 sw=4 et ft=mercury
|
|
%---------------------------------------------------------------------------%
|
|
%
|
|
% Regression test.
|
|
% Previously a singleton switch could be replaced by the case goal, possibly
|
|
% with a functor test beforehand, but that's only true if the case arm is
|
|
% applicable to only a single functor.
|
|
%
|
|
|
|
:- module simplify_multi_arm_switch.
|
|
:- interface.
|
|
|
|
:- import_module io.
|
|
|
|
:- pred main(io::di, io::uo) is det.
|
|
|
|
%---------------------------------------------------------------------------%
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- implementation.
|
|
|
|
:- import_module bool.
|
|
|
|
:- type fruit
|
|
---> apple
|
|
; pear
|
|
; banana
|
|
; plum.
|
|
|
|
:- pred squishy(fruit::in) is semidet.
|
|
:- pragma no_inline(squishy/1).
|
|
|
|
squishy(Fruit) :-
|
|
(
|
|
( Fruit = apple
|
|
; Fruit = pear
|
|
),
|
|
IsSquishy = no
|
|
;
|
|
( Fruit = banana
|
|
; Fruit = plum
|
|
),
|
|
IsSquishy = yes
|
|
),
|
|
IsSquishy = yes.
|
|
|
|
main(!IO) :-
|
|
( if squishy(apple) then
|
|
io.write_string("bug!\n", !IO)
|
|
else
|
|
io.write_string("ok\n", !IO)
|
|
).
|