http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54140
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-07-31 15:27:09 UTC --- (In reply to comment #0) > This would have been appropriate if I wrote "case 72:", but I didn't -- I > wrote > "case (Enum)72:". This is an explicit indication that I want gcc to treat 72 > as a member of Enum here The values of the enumeration type are the values in the range [0,1] so there is no way to treat 72 as type Enum, the value is not defined.