http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48559
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-04-12 19:20:29 UTC --- (In reply to comment #2) > On the other hand, we sometimes need references to elements of the > random-access input sequence(s). We could always use an iterator, but that > might be inefficient. And we cannot take the lvalue reference or the address > of a dereferenced random access iterator, can we? Yes you can for most iterators (not for move_iterator, but that's unusual) > (Although this is > unfortunately done so far in multiseq_selection.h.) Can we always take the > rvalue reference of a dereferenced random access iterator? No (you can for move_iterator). For most iterators (especially random access iterators including pointers) iterator_traits<It>::reference will be an lvalue reference.
