[llvm] [clang] [flang] [compiler-rt] [libcxx] [clang-tools-extra] [libc] Reland: [libc++][format] P2637R3: Member visit (std::basic_format_arg) #76449 (PR #79032)

[Hristo Hristov via cfe-commits]

H-G-Hristov wrote:

> @H-G-Hristov Would it be possible to update your branch? I sent it to our Windows builders but Clang is segfaulting while building runtimes.

Thank you for taking a look. I updated the branch. Please note that pre-release Clang 18 used to have a bug related to "deducing this", which is used by this feature. It has been rectified since then: https://github.com/llvm/llvm-project/pull/75913
The other patch related to this paper seems to have passed the CI: https://github.com/llvm/llvm-project/pull/76449

https://github.com/llvm/llvm-project/pull/79032