[libcxx-commits] [libcxx] [libc++] Define deque::__block_size inline (PR #89422)

[A. Jiang via libcxx-commits]

frederick-vs-ja wrote:

I think we may need to move `__block_size` into function bodies (and repeat it many times) to support incomplete element types and be optimization-friendly.

https://github.com/llvm/llvm-project/pull/89422