Re: Pcc, generic compilation

gclind01@starbase.spd.louisville.edu (George C. Lindauer) writes:
>...E.G. instead of having the main
>compiler resolve numerical offsets, just have it pass the structure
>names and fields and elementary types and then have the backend
>resolve the offsets with any alignment or other concerns?


That would be nice--but as the moderator says, there are some things
more easily handled in the front end. Case in point for C: sizeof()
and offsetof() have to yield constants/constant expressions, so it's
theoretically possible (bizarre, but theoretically possible) to write
something like


switch (i) {
case offsetof(struct woof, x):
/* blah */
break;
case offsetof(struct arf, x):
/* blah 2 */
break;
}


and it would be a major pain to make the back end give a reasonable error
message if, say, the values were identical!


James Jones
--

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