[libc-commits] [libc] [libc] Add and use 'cpp::launder' to guard placement new (PR #146123)

[Jon Chesterfield via libc-commits]

https://github.com/JonChesterfield approved this pull request.

Thanks, yep. This is to officially retrieve the correctly typed pointer after one has carelessly lost track of it after the placement new.

https://github.com/llvm/llvm-project/pull/146123