On Mon, 24 Jan 2005, Andi Kleen wrote:
>
> > Does C99 allow underscores in numbers? I can't read the above number
> > without rewriting it as 0x8_0000_0000_0000
>
> No, it doesn't, although I'd agree it would be an useful extension.
Sparse used to, exactly because of this. But since we can't use that
syntax anyway with gcc, and Al worked on making the preprocessor do the
right thing with various test-cases, it got removed.
Linus
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