Re: [Boost-users] iterators must go

Scott McMurray wrote:

On Fri, May 15, 2009 at 17:15, Daniel James wrote:

...

The relevant point is that bringToFront's first range can step over the second range.

I'm very curious how that's supposed to work. What if, for example, the second range is a superset of the first? Or, since they can be two different types, what happens if I do the same thing as the above, but "retro" one or both of the ranges? It just sounds brittle to me.

Or, even simpler, how do I do this?

size_t strnlen(char *p, size_t n) { return find(p, p+n, '\0') - p; }

That's the size of a range, but I don't know how to get that range.

You don't. Null-terminated strings, in Alexei's model, are ranges that have a fixed end point, which you can't modify. (There is no representation in the range for it.) You basically have to reinterpret the nts as an array with a known end-point, so you can treat it as a random access range. Now, for an rar, getting that range is easy. Sebastian