Re: [boost] [review] Review of Unordered library begins today December7

Joaquín Mª López Muñoz wrote:

I think unordered containers are *not* allowed to rehash when erasing: see N2461, 23.1.3/8

"...Rehashing invalidates iterators, changes ordering between elements,..."

and 23.1.3/12

"...The erase members shall invalidate only iterators and references to the erased elements."

so the conclusion is that erase can't rehash (incidentally, the implications of rehashing when erasing a range would be difficult to cope with).

If a container implemented a rehash which doesn't invalidate iterators (which is certainly possible, if unlikely) then could it rehash? (Of course, such a container would have to maintain the order of the elements). Daniel