enum underlying type specifier

enum underlying type specifier

[Kevin Yohe]

Hi,

I am trying to compile the following code using gcc-4.1.0,

typedef unsigned short tWord16;

         ...

typedef
   enum eFoo : tWord16
      {  // eFoo
         Foo1 = 1,
         Foo2 = 2,
         ...
      }  // eFoo
   tFoo;

         ...

and get the following errors,

powerpc-750-elf-gcc -c -r -gdwarf-2 -fno-exceptions -fno-weak -fno-check-new
Foo.cpp -o Foo.o
Foo.h:30: error: use of enum 'eFoo' without previous declaration
Foo.h:30: error: expected unqualified-id before ':' token

Is the following grammar,

enum [identifier [: type]] { ... }

not standard c++?

If so, can I control the c++ dialect using a compiler flag to allow this to
compile.

Regards,
Kevin

RE: enum underlying type specifier

[John (Eljay) Love-Jensen]

Hi Kevin,

Unless I'm mistaken, that's not compliant C++ for an enum.  Maybe it's a C99-ism?  (I'm not C99 savvy.)

Personally, I wish enum's did have that kind of size specifying syntax, like that did on my old Amiga C compiler as a C language extension... hmmm, was that Lattice C or Manx C... I don't recall now.

Sincerely,
--Eljay