Consider whether the address iterator members can be constexpr

[chriskohlhoff]

[chriskohlhoff]

And range members.

[chriskohlhoff]

Pre-Lenexa Summary

[internet.address.iter], [internet.address.range]

Is it possible for the iterator and range members to be made constexpr? Is there a use case to justify it?

One potential use case is to find a successor address as a constant expression. E.g.:

constexpr ip::address_v4 next = *++ip::address_v4_iterator(ip::address_v4::loopback());