[libcxx-commits] [libcxx] [libc++] Remove `noexcept` from `format_context::arg` method (PR #205809)

[A. Jiang via libcxx-commits]

https://github.com/frederick-vs-ja requested changes to this pull request.

I don't think we can accept this, because the `noexcept` is specified by the standard. See [[format.context]](https://eel.is/c++draft/format.context).

If you feel like that `basic_format_arg::arg` should be allowed to throw an exception, I think you should figure out the reason and then submit an LWG issue.

https://github.com/llvm/llvm-project/pull/205809