LLVM/project da618cf — libcxx/include regex future, libcxx/include/__atomic atomic.h atomic_ref.h
[NFC][libc++] Guard against operator& hijacking. (#128351) This set usage of operator& instead of std::addressof seems not be easy to "abuse". Some seem easy to misuse, like basic_ostream::operator<<, trying to do that results in compilation errors since the `widen` function is not specialized for the hijacking character type. Hence there are no tests.
