[clang] [llvm] [Clang][C++23] Core language changes from P1467R9 extended floating-point types and standard names. (PR #78503)

[via llvm-commits]

cor3ntin wrote:

@codemzs I want to make sure you saw the pending feedback. I think it would be great if we could land this for clang 21 :)

https://github.com/llvm/llvm-project/pull/78503