LWG-3798 Rvalue reference and `iterator_category`

[StephanTLavavej]

LWG-3798 Rvalue reference and iterator_category

[frederick-vs-ja]

I find that I forgot mentioning elements_­view::​iterator in the proposed resolution. I've submitted another LWG issue to fix this.

Edit: it's LWG-3832 now.

Edit: the originally proposed resolution of LWG-3832 was incorrect. I've mailed LWG chair to propose an updated resolution (the first correction was still incorrect, and the following is the second):

If range_reference_t<Base> is a reference type and std​::​get<N>(*current_) is an prvalue or neither range_reference_t<Base> nor tuple_element_t<N, range_reference_t<Base>> is a reference type, iterator_category denotes input_iterator_tag.