On Fri, 30 Nov 2018 at 12:25, Jonathan Wakely <jwak...@redhat.com> wrote: > Yes, that's exactly what I had in mind (and what I expect to get > proposed for C++20 in the near future). > > What does everyone else think, should we go ahead and do this?
Yes, if we are confident that's what will be in C++20. > The point is that C++20 changed forward_list (and list, for > consistency) to return the number of removed elements. The reason for > that is you can't easily find out the size before and after removing > elements, because forward_list doesn't have a size() member! > So IMHO the non-member erase should also return the size, and so that > it's uniform it should do that for all containers not just the lists. I don't mind forward_list being an exception. Returning the size from other containers is a bit pointless; presumably it would need to return a pair, and handling that is clunky even with structured bindings.
