https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88731
Bug ID: 88731
Summary: Rejects well-formed program using bit-fields in
_Generic.
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: anders.granlund.0 at gmail dot com
Target Milestone: ---
Test case (prog.c):
int main()
{
struct S { unsigned x:4; } s;
_Generic(s.x, unsigned: 0);
}
Compilation command line:
gcc prog.c -Wall -Wextra -std=c11 -pedantic-errors
Observed behaviour:
The following error message is outputed:
error: '_Generic' selector of type 'unsigned char:4' is not compatible
with any association
Expected behaviour:
No error message outputed.
See http://www.open-std.org/Jtc1/sc22/wg14/www/docs/summary.htm#dr_481:
"... It was noted that bitfields are of integer type. ..."
Note:
Clang accepts the program without any error message.
