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

[A. Jiang via libcxx-commits]

frederick-vs-ja wrote:

> 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?

There're currently 2 `push_front` overloads, taking `const value_type&` and `value_type&&` respectively, containing almost identical code. The newly introduced `emplace_front` makes the code only written once.

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