> Many compilers do just that, however, that said, unless the compiler is
> prepared for it, since it effectively yields a struct of zero size which
> normally is a no-go, it could produce bugs involving sizeof, initializers,
> pointer addition et al, even some divisions by zero if the compiler is
> making certain assumptions already, unless it already can have zero length
> objects of this nature for some other reasons.

actually, kenc is pretty good about all these. if you have

struct fu {void x;};

and take sizeof(struct fu), that will give a diagnostic error.

the reason i avoided it was to not mess with the grammer, but if this is a
common thing, maybe it's no big deal.

though as charles points out, it is a bit of a waste of time.