[llvm-branch-commits] [libc] [libc][wctype] Upstream enumerate header from PtrHash-cc prototype to LLVM libc (PR #174820)

[Michael Jones via llvm-branch-commits]

https://github.com/michaelrj-google commented:

`enumerate` isn't used in this PR stack. In general it's best to avoid adding code until it's needed, since unused code tends to bitrot and need fixing before it's used anyways.

https://github.com/llvm/llvm-project/pull/174820