Linus Torvalds wrote:
>
> On Wed, 5 Jul 2006, Randy.Dunlap wrote:
>> OK, I'll bite. What part of Linus's macro doesn't work.
>
> Heh. This is "C language 101".
>
> The reason we always write
>
> #define empty_statement do { } while (0)
>
> instead of
>
> #define empty_statement /* empty */
>
> is not that
>
> if (x)
> empty_statement;
>
> wouldn't work like Arjan claimed, but because otherwise the empty
> statement won't parse perfectly as a real C statement.
But the classical way of empty statments is "((void) 0)"
See K&R, glibc or SuS, for assert.h
( http://www.opengroup.org/onlinepubs/000095399/basedefs/assert.h.html )
or I miss something?
ciao
cate
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