[libcxx-commits] [libcxx] [libc++][hardening] Constrain construction for `__{(static_)bounded, wrap}_iter` (PR #115271)

[A. Jiang via libcxx-commits]

frederick-vs-ja wrote:

> Can you also make this change for `__static_bounded_iter` which was added just now?

Changed. Also added a previously missed change to one friend declaration.

https://github.com/llvm/llvm-project/pull/115271