http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53745
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2012-06-21
Resolution|INVALID |
Summary|Bitshifted value (1 << 31) |[C++11] Poor diagnostic for
|within enumerator class is |ill-formed narrowing
|calculated incorrectly |conversion in enumerator
|during compilation. |initializer
Ever Confirmed|0 |1
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-06-21
17:51:43 UTC ---
Re-opening since the diagnostic could be better, the value is not "too large",
the problem is with the sign, not the magnitude.
enum E : unsigned long long { e = -1 };
e.cc:1:26: error: enumerator value -1 is too large for underlying type
'unsigned long long'
Clang gives a more accurate diagnostic, though not necessarily more helpful if
you don't know what a narrowing conversion is:
e.cc:1:25: error: enumerator value evaluates to -1, which cannot be narrowed to
type 'unsigned long long' [-Wc++11-narrowing]
