4 ms·

Amazing it can do that. How does it work? That definitely does seem to change its semantics to me. I am not a c expert but this surely has problems the previou

Amazing it can do that. How does it work? That definitely does seem to change its semantics to me. I am not a c expert but this surely has problems the previous one doesn’t?

hathawsh 2y ago
It does change the semantics if n is negative or large enough to cause an overflow. The challenge for the compiler is to somehow prove that neither of those things can happen.
- kryptiskt 2y ago
  It doesn't have to prove absence of overflow since that is undefined behavior in C and thus modern compilers assume it can never happen.
  - hathawsh 2y ago
    Great point.