Is there assign_or_inserter/insert_or_assigner in C++20?

Question

std::inserter suffers from problem that it calls insert that for map is noop if key already exists. There is std::map::insert_or_assign, but I was unable to find an inserter that uses that.

Is there something like this in C++20?

note: I know I can c/p it from somewhere on the SO/internet, I am interested in STL/boost solutions, not c/p implementation from somewhere.

Answer 1

No, there is no corresponding inserter that use insert_or_assign. In fact, the wording explicitly says there are only 3 such functions:

back_­inserter, front_­inserter, and inserter are three functions making the insert iterators out of a container.