On Wed, Oct 19, 2011 at 12:40 PM, Olaf van der Spek <ml@vdspek.org> wrote:
On Wed, Oct 19, 2011 at 9:31 PM, Jeffrey Lee Hellrung, Jr. <jeffrey.hellrung@gmail.com> wrote:
Yes. Changing iterator_traits (specifically, the collection of types associated with an iterator) is where I'm leaning, if you really want an unsigned iterator_range::size().
If you've got another / better solution for the signed/unsigned mismatches that result from a signed size() I'd be happy to hear it from you.
I don't, and, indeed, I wasn't aware that difference_type was restricted to be a builtin signed integral type. So make_unsigned seems to work.
What would the problem be of just using std::size_t?
Well, likewise, what would be the problem of always using std::ptrdiff_t for difference_type? And, aside from whether std::size_t would be wide enough,
How is difference_type relevant?
I was just making an analogy... Honestly, I'd be surprised if there were any practical problems with using std::size_t, but likewise I'd be surprised if there were any practical problems with always using std::ptrdiff_t for difference_type. - Jeff