Implements parts of:
- P0896R4 The One Ranges Proposal`
Depends on D100269.
cjdb on Sun, Apr 11, 1:58 PM.Authored by
The intention is for there to be a libc++ test suite and an MSVC STL test suite. It improves coverage and also lets us respect the different project test structures without being intrusive.
This looks OK to me apart from the input_iterator archetype naming.
Reached offline agreement with @cjdb about using cpp20_input_iterator here. Chris, please change to that instead of cxx20 and ship it.
Other reviewers, please say it if you have a blocking objection with that direction, otherwise I think we've spent far enough energy on this name selection.