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Subject: [Bug c++/56155] New: [C++0X] enumeration with fixed underlying type - enum literals have wrong type
Date: Wed, 30 Jan 2013 16:29:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D56155

             Bug #: 56155
           Summary: [C++0X] enumeration with fixed underlying type - enum
                    literals have wrong type
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mib.bugzilla@gmail.com


For an enumeration whose underlying type is fixed, the values of the
enumeration are the values of the underlying type. gcc appears to be ignori=
ng
the underlying type, as the value of E_ in this example is 4

 gpp48 bug1.cpp -std=3Dc++0x
bug1.cpp: In function =C3=A2int main()=C3=A2:
bug1.cpp:4:3: error: static assertion failed: E_ should be 1
   static_assert( E_ =3D=3D 1, "E_ should be 1");
   ^

enum e_ : unsigned char { Z_, E_=3Dsizeof(Z_) };
#include <stdio.h>
int main(void) {
  static_assert( E_ =3D=3D 1, "E_ should be 1");
  printf("z is %d e is %d\n", Z_, E_ ); // prints 4
  printf("sizeof unsigned char is %d\n", sizeof(unsigned char)); // prints 1
  printf("sizeof e_ is %d\n", sizeof(e_)); // prints 1
  return 0;
}