[Bug libstdc++/122254] New: Extend vector(InputIterator, InputIterator) handling of C++20 iterators to other members and to std::string

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122254

            Bug ID: 122254
           Summary: Extend vector(InputIterator, InputIterator) handling
                    of C++20 iterators to other members and to std::string
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
  Target Milestone: ---

Bug 108487 optimized construction of std::vector from iterators which satisfy
the std::forward_iterator concept but do not meet the Cpp17ForwardIterator
requirements.

The same optimization should be applied to vector::insert and vector::assign
etc.

Also std::basic_string::basic_string(InputIterator, InputIterator).

This is not required by the standard, but would be a QoI improvement.