https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69672
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-18
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.9.3, 5.3.0, 6.1.0, 7.0
Severity|normal |enhancement
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Unlike bug 69670 I think it makes sense to consider this change request for two
reasons: first, because when one of the enumerated types is anonymous it seems
like a good indication that its enumerators are intended to be used as poor
man's integer constants whose type doesn't matter, and second, because Clang
doesn't warn in this case.
$ cat u.cpp && /build/gcc-trunk-svn/gcc/xgcc -B /build/gcc-trunk-svn/gcc -S
-Wall -Wextra -Wpedantic u.cpp
enum E { e };
enum { f = e };
int foo (E a)
{
return a == f;
}
u.cpp: In function ‘int foo(E)’:
u.cpp:6:15: warning: comparison between ‘enum E’ and ‘enum<anonymous>’
[-Wenum-compare]
return a == f;
^
