Re: Possible C++ bug: Are C enum tags unsigned?

["Martin v. Loewis" <martin at loewis dot home dot cs dot tu-berlin dot de>]

> But I vaguely recall a rule in ANSI C that enum values decay to int
> when you use them.  Is my memory being over-specific about the type?

[C says]
Each enumerated type shall be compatible with an integer type. The
choice of type is implementation-defined, but shall be capable of
representing the values of all the members of the enumeration.
[6.7.2.2/4]

GCC defines this implementation choice as

  /* Construct the final type of this enumeration.  It is the same
     as one of the integral types - the narrowest one that fits, except
     that normally we only go as narrow as int - and signed iff any of
     the values are negative.  */
[c-decl.c:finish_enum]

Regards,
Martin