Swapping variables using XOR, the edge case

Sat, 01/07/2023 - 08:42

Consider the following function:

void swap(int *a, *b)
{
  a* ^= b*; b* ^= a*; a* ^= b*;
}

And it will nicely zero-out x, if called swap(&x, &x), instead of leaving x intact...

Take care!