[libcxx-commits] [libcxx] [libc++][modules] Mark as implemented. (PR #90091)

[Mark de Wever via libcxx-commits]

mordante wrote:

IMO in general we document what we do not what vendors do. For example, we mark features as implemented even when Apple decides not to make them available on backdeployment targets. (I  understand why Apple does not want to do that.). Especially in this case; we have no control whether a vendor does or does not ship the installed module. Just testing for the CMake flag does tell us what the vendor does.

So I'm happy to change that, but IMO then we should discuss what we consider as implemented and when we can mark things as implemented. 

https://github.com/llvm/llvm-project/pull/90091