On Mon, Aug 06, 2007 at 05:51:29PM +0200, Jan Engelhardt wrote:
>
>On Aug 6 2007 04:26, Al Viro wrote:
>>
>> C99 6.10.3[11]: preprocessing directive within the argument list
>>of macro invocation => undefined behaviour. Don't do that...
>
>String concatenation ("a" "b") is not a preprocessing directive.
>
>$ gcc -E test.c
># 1 "test.c"
># 1 "<built-in>"
># 1 "<command line>"
># 1 "test.c"
>printf("a" "b");
>
>(If it was, the "a" "b" would have already been joined.)
>
Yes. According to C99 5.1.1.2, string concatenation is done in Phase 6,
that's after preprocessing.
Regards.
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