[libcxx-commits] [libcxx] [libc++] Move allocator assertion into allocator_traits (PR #94750)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne commented:

One caveat with this approach is that if a user specializes `allocator_traits`, they don't get the diagnostic anymore.

https://github.com/llvm/llvm-project/pull/94750