gcc's <stdbool.h> is broken

[Neil Booth]

Zack Weinberg wrote:-

> There is a real bug in this area, though: in C++, after including
> stdbool.h, you still can't use 'true' and 'false' in #if.  They are
> defined to themselves, and the preprocessor doesn't know the
> keywords.

Hi Zack,

I'm a little confused.  What exactly does the C++ standard say
w.r.t. true and false, and is your patch different?

Neil.