5:02 a.m.
On Mon, Sep 13, 2021 at 11:53:25AM -0700, Nathan Chancellor wrote:
On Mon, Sep 13, 2021 at 03:38:13PM -0300, Jason Gunthorpe wrote:
> On Mon, Sep 13, 2021 at 10:00:02AM -0700, Nick Desaulniers wrote:
>
> > > This macro would like to know that the passed in member name has a u64
> > > type, all the things I've come up with fail on clang - but many work
> > > fine on gcc. Frankly I think this case is a clang bug myself..
> >
> > Perhaps, though this assertion looks a bit like offsetof() to me. I
> > wonder if that can help here?
>
> The assertion would logically like to be this:
>
> static_assert(typecheck(((struct qib_port *)0)->N, u64))
This works for me with both GCC and clang, if that is acceptable to you?
It fails if you change one of the variables to 'u32'.
Yes, thanks. Can't say I've even heard of __same_type before :\ would
be nice if this was in typecheck.h along with the other variations of
the same idea. Presumably it is a little bit different from those
somehow?
Jason