4 ms·

But if it's unsigned this will never be true either... Conceptually, it works through promotion. -1 is cast to unsigned/size_t before the test, which then succ

But if it's unsigned this will never be true either... Conceptually, it works through promotion. -1 is cast to unsigned/size_t before the test, which then succeeds. At the assembly level, a 32-bit -1 is 0xFFFFFFFF, which is also the result of the underflow of i, so it works at that level, too. At any rate, it worked in the compiler I tried it with.

Retric 11y ago
Technically no language was specified, so depending on specific casting rules is risky. This could easily just throw a compilation error.
- cperciva 11y ago
  When you're reading tedu's blog, it's safe to assume that anything which looks like C is C.