On Wed, 18 Dec 2013 01:33:03 +0000, Steven D'Aprano wrote: >> or just what operation "x + y" is >> actually going to perform. > > > With no operator overloading, that one at least is correct.
Actually, I stand corrected. I was completely mistaken about that. The C operation x + y is undefined if the addition overflows. A valid C compiler can produce whatever code it damn well feels like in the case of overflow. Oh, and in case you think that integer overflow in C will always follow two's complement semantics, such that INT_MAX+1 = INT_MIN, you are wrong. That's not guaranteed either. Clang and gcc have a flag, -fwrapv, to force defined behaviour on integer overflow, but that's not part of the C standard and not all C compilers will do the same. -- Steven -- https://mail.python.org/mailman/listinfo/python-list
