[libcxx-commits] [libcxx] [libc++] optimization on ranges::drop_view::begin (#72883) (PR #72929)

[Hongyu Ouyang via libcxx-commits]

casavaca wrote:

Rebased on llvm/main. Also made stylish chanege to use `const auto`, similar to microsoft STL in 
https://github.com/microsoft/STL/blob/cf1313c39169dc376761eddee23c5e408e01aaa9/stl/inc/ranges#L3359

Let's see if CI is happy.

https://github.com/llvm/llvm-project/pull/72929