Why would we want to pedwarn? As far as I can tell, the standard
doesn't say this is ill-formed. 9.6 says,
"The value of the integral constant expression may be larger than the
number of bits in the object representation (3.9) of the bit-field’s
type; in such cases the extra bits are used as padding bits and do not
participate in the value representation (3.9) of the bit-field."
and
"A bool value can successfully be stored in a bit-field of any nonzero
size."
I'm sure that lots of users would complain about the compiler starting
to reject bool bitfields of 2-8 bits.
I'm not opposed to warning about excessive size for bool and enum here,
but the warning should be based on TYPE_SIZE rather than TYPE_PRECISION.
Jason
