I'd noticed that I misread the original code and replied to my top-level post. But that's an interesting point about the standard - perhaps it's intended to al

I'd noticed that I misread the original code and replied to my top-level post. But that's an interesting point about the standard - perhaps it's intended to allow a smaller sizeof(ptrdiff_t) than sizeof(void *), where no contiguous allocation would be allowed such that you the larger type.