[clang] [clang-tools-extra] [libcxx] [llvm] [libc++][ranges] P2542R8: Implement `views::concat` (PR #120920)

[Hristo Hristov via cfe-commits]

H-G-Hristov wrote:

> > @changkhothuychung The be more specific. You should add the paper entry here:
> > https://github.com/llvm/llvm-project/blob/4887e41055686eede9c155e6b3296b92fe86c2d5/libcxx/docs/ReleaseNotes/21.rst?plain=1#L41
> > 
> > And update the status accordingly:
> > https://github.com/llvm/llvm-project/blob/4887e41055686eede9c155e6b3296b92fe86c2d5/libcxx/docs/Status/Cxx2cPapers.csv?plain=1#L57
> > 
> > It also looks like there are additional related LWGs that you should implement probably :
> > https://github.com/llvm/llvm-project/blob/4887e41055686eede9c155e6b3296b92fe86c2d5/libcxx/docs/Status/Cxx2cIssues.csv?plain=1#L72
> 
> I think let's address LWG4082 in another PR for better tracking?

I am not an authority here but normally we try to address the LWGs in the same PR.

https://github.com/llvm/llvm-project/pull/120920