warning: pasting would not give a valid preprocessing token

[Andrew Pinski]

Change macro_test to
#define macro_test(x)	temp.x++
You do not need ## in this case at all, learn some C preprocessing.

The only case you need ## is when a##x and you want a or x to be 
expanded.

Thanks,
Andrew Pinski


On Tuesday, August 21, 2001, at 09:22 AM, Alex Feldman wrote:

> Hello,
>
> I compiling the follow program on Red-Hat Linux 7.0 with gcc 2.96.
>
> #define macro_test(x)	tmp.##x++
> typedef struct {
> 	int test;
> } test_t;
> int main()
> {
> 	test_t tmp;
> 	tmp.test = 0;
> 	macro_test(test);
> }
>
> when I compiled this program with gcc I received the following warning:
>
> 	test.c:11:18: warning: pasting would not give a valid 
> preprocessing token
>
> What's wrong with this macro and what this warning means?
>
> Thank you.
>
> Alex
>
>