[libcxx-commits] [libcxx] [libc++] Optimize {set, map}::{lower, upper}_bound (PR #161366)

[Louis Dionne via libcxx-commits]

ldionne wrote:

(re-posting since I previously posted before the end of the meeting by mistake, which we're not supposed to do)

For posterity, while the validity of this optimization was challenged due to the Boost.ICL issue linked, LEWG reinforced libc++'s interpretation of the Standard when it discussed LWG 4572 at the Brno meeting, confirming that this optimization is valid.

https://github.com/llvm/llvm-project/pull/161366