[boost] Re: [utility] question on prior(x,n)

Daniel Frey <daniel.frey@aixigo.de> writes:

...

Incidentally, it's almost always possible to detect whether the first argument supports operator += or operator-=. That might be a good way to decide whether to advance/regress it.

If is_iterator yields false

There is no is_iterator trait AFAIK. And I wasn't suggesting that. I was suggesting something more like is_+=able and is_-=able traits.

this is good to distinguish the rest, yes. But the first question is, whether we want to enhance the 2-arg version of next/prior or if we simply rename them to e.g. advanced/regressed. I'd be happy with the latter. Comments?

I find those names rather awful for functions; no offense intended. -- Dave Abrahams Boost Consulting www.boost-consulting.com