[libcxx-commits] [libcxx] [libc++] Refactor __split_buffer to eliminate code duplication (PR #114138)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 requested changes to this pull request.

The other patch removed some code duplication, but this introduces `emplace_front` and only uses it to implement `push_front`. What is the point of that?

https://github.com/llvm/llvm-project/pull/114138