Re: Question about "enums"


Ian Collins wrote:
Bill Pursell wrote:
Ian Collins wrote:


Assigning any other value to <an enum type> is undefined. Unfortunately C
compilers don't regard this as an error, which renders enums little more
than symbolic constants.


gcc gives a warning when you do a switch on an enum type, indicating
that you have failed to explicitely specify behavior for any of the
listed cases. I find that very useful.

But not with the following, which I've always considered a huge hole in
the C standard.

enum loop { NO, YES};
enum loop okloop=YES;

void f( enum loop v )
{
}

int main(void)
{
f( 42 );

okloop = 42;

return 0;
}

Agreed. I've never written a compiler, but it strikes me that that
should be a fairly simple warning to emit. Does anyone know why such
warnings are not given?

.

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