https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110259
Bug ID: 110259
Summary: Wrong warning 'conversion to unsigned int' with enum
and comma
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: roland.illig at gmx dot de
Target Milestone: ---
~~~c
enum e {
e1,
e2,
};
int side_effect(void);
enum e demo(_Bool, enum e);
enum e
demo(_Bool cond, enum e c1)
{
enum e var = cond
?
c1
:
(
side_effect(),
e2
);
return var;
}
~~~
gcc-12.2.0 gcc -O2 -Wconversion -c indent.c
indent.c: In function ‘demo’:
indent.c:16:22: warning: conversion to ‘unsigned int’ from ‘int’ may change the
sign of the result [-Wsign-conversion]
16 | :
| ^
Same result for -ansi, -std=c99, -std=c2x, as well as for GCC 10.4.0.
Removing the 'side_effect(),' makes the warning disappear.
The comma operator has the type of its right operand, therefore I don't see
where the 'unsigned' might come from.
