Hi,
On Sun, Jul 29, 2012 at 3:19 PM, Luigi Rizzo <ri...@iet.unipi.it> wrote:
> Remapping f(a) into f(a, b) requires both a macro
> and a wrapping function, something like this
>
> T __f(T1 a, T2 b) { return f(a, b); }
> #define f(a) __f(a, b)
>
This can be done way more easily:
void fn(int a, int b)
{
printf("%d %d\n", a, b);
}
#define fn(x) ({ fn(x, 42); })
int main(int argc, char **argv)
{
fn(0);
return 0;
}
works just fine.
> but i am not so interested in participating to the IOCCC :)
>
maybe you should ;-)
- Arnaud
ps: this construct is used all over the Linux kernel compatibility libraries.
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