[libc-commits] [libc] [libc] Add entrypoint for iswxdigit (PR #185574)

[Michael Jones via libc-commits]

https://github.com/michaelrj-google approved this pull request.

LGTM, I'll comment when I've merged the previous PRs so you can resolve the merge conflicts and then I will merge this PR.

https://github.com/llvm/llvm-project/pull/185574