On Thu, 2008-07-17 at 20:54 +0000, Eric Rannaud wrote:
> Oh, and there is another case I forget, for which you would need
> language support:
>
> struct a {
> int x, y;
> #ifdef DEPRECATED_FEATURE /* too go in 2 revisions */
> char c;
> #endif
> };
This is definitely not something that should be done with the
preprocessor. In this particular case, what you are looking for is an
annotation.
> Of course, I guess one can do that with type classes. But is it worth
> the trouble? And there is no 'deriving' (cf. Haskell) in BitC, is
> there?
Not yet, but that is about to be fixed.
> I can't think of a way of doing in BitC, without conditional
> compilation, the equivalent of
>
> void foo(struct a *a, int p)
> {
> a->x = p;
> a->y = 2*p;
> #ifdef DEPRECATED_FEATURE
> a->c = '0';
> #endif
> }
Or equivalently, some form of clean-ish macro mechanism.
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