Module negators: Deprecated in C++17, no longer in the standard since C++20. Use not_fn instead.
Module pointer_adaptors: Deprecated in C++11, no longer in the standard since C++17.
Module ptrmem_adaptors: Deprecated in C++11, no longer in the standard since C++17. Use mem_fn instead.
Struct std::__is_nullptr_t< _Tp >: Use is_null_pointer instead.
Struct std::binary_function< _Arg1, _Arg2, _Result >: Deprecated in C++11, no longer in the standard since C++17.
Struct std::is_literal_type< _Tp >: Deprecated in C++20. The idea of a literal type isn't useful.
Struct std::is_pod< _Tp >: Use is_standard_layout && is_trivial instead.
Struct std::unary_function< _Arg, _Result >: Deprecated in C++11, no longer in the standard since C++17.