02.10.2013 12:41, Jonathan M Davis пишет:
On Wednesday, October 02, 2013 12:32:24 Alexandr Druzhinin wrote:
Is it safe to replace code:
uint index;
// do something
index++;
if(index == index.max)
index = index.init;
by the following code
uint index;
// do something
index++; /// I use unsigned int so uint.max changed to 0 automagically
Well, not quite. Your first one skips uint.max. It goes from uint.max - 1 to 0,
whereas the second one goes from uint.max to 0. So, they're subtly different.
But yes, incrementing the maximum value of an unsigned integral type is
guaranteed to wrap around to 0. Signed integers are of course another matter
entirely, but it's guaranteed to work with unsigned integers.
- Jonathan M Davis
Thanks for clarification.
