[libcxx-commits] [libcxx] Revert "[libc++] Allow the use of extensions in the implementation (#79532)" (PR #85792)

[Mark de Wever via libcxx-commits]

mordante wrote:

> > @sam-mccall what modules are you talking about Clang modules or C++20 modules?
> 
> Our deployment is Clang modules (which would also count as C++20 header units IIUC). My reading of the code is that diagnostic mappings take the same codepath in both cases. I don't have a large-scale C++20 modules codebase with libc++ set up as named modules to test on.

Thanks! I was just confused whether this is related to Clang or C++ modules.


https://github.com/llvm/llvm-project/pull/85792