anonymous_namespace{Accessor.hpp} 名前空間

クラス
struct	if_division
struct	if_division< T, std::void_t< decltype(std::declval< T >()/std::declval< T >())> >
struct	if_multiplication
struct	if_multiplication< T, std::void_t< decltype(std::declval< T >() *std::declval< T >())> >
struct	if_remainder
struct	if_remainder< T, std::void_t< decltype(std::declval< T >() % std::declval< T >())> >
struct	if_subtraction
struct	if_subtraction< T, std::void_t< decltype(std::declval< T >() - std::declval< T >())> >