[llvm-branch-commits] [libcxx] release/21.x: [libc++] Implement comparison operators for `tuple` added in C++23 (#148799) (PR #151808)

[A. Jiang via llvm-branch-commits]

frederick-vs-ja wrote:

> Why do we want to back-port this? This looks to me very much like feature work.

See also https://github.com/llvm/llvm-project/pull/148799#pullrequestreview-3079726788. I'm inclined to backport this, but I will be also fine if backport is eventually rejected.

https://github.com/llvm/llvm-project/pull/151808