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### 2208. `std::reverse_iterator` should be a literal type

Section: 23.5.1 [reverse.iterators] Status: Resolved Submitter: Jeffrey Yasskin Opened: 2012-10-30 Last modified: 2017-03-12

Priority: 3

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Discussion:

`std::reverse_iterator::reverse_iterator(Iterator)` should be constexpr so that other constexpr functions can return `reverse_iterator`s. Of the other methods, the other constructors, `base()`, `operator+`, `operator-`, `operator[]`, and the non-member operators can probably also be `constexpr`.

`operator*` cannot be constexpr because it involves an assignment to a member variable. Discussion starting with c++std-lib-33282 indicated that it would be useful to make reverse_iterator a literal type despite this restriction on its use at compile time.

Proposed resolution:

This issue was Resolved by paper P0031R0 adopted at Jacksonville, 2016.