I'm writing some cross-platform code and I invite the developer to
pick their own integer types in places. However, the integer type must be
unsigned. So far, I make sure this is so with:

typedef int SegIMustBeUnsigned[(SegI)-1 > 0 ? 3 : -3];

Yes, this does the trick, but I'm just wondering if anyone here has a
better way of doing it.

--
Tomás Ó hÉilidhe

Tomás Ó hÉilidhe <t...@lavabit.com> wrote:
> I'm writing some cross-platform code and I invite the
> developer to pick their own integer types in places.
> However, the integer type must be unsigned.

BTW, be careful about allowing unsigned types that promote
to (signed) int.

> So far, I make sure this is so with:
>
> typedef int SegIMustBeUnsigned[(SegI)-1 > 0 ? 3 : -3];
>
> Yes, this does the trick, but I'm just wondering if
> anyone here has a better way of doing it.

Google for compile time asserts. There are a few ways, but
none of them are any more or less elegant that what you
have.

--
Peter