[libcxx-commits] [libcxx] [libcxx] makes `pair` conditionally trivially copyable for C++20 (PR #84811)

[James Y Knight via libcxx-commits]

jyknight wrote:

I believe there shouldn't be ABI impact from modifying pair to derive from a zero-sized base class.

https://github.com/llvm/llvm-project/pull/84811