std::is_member_pointer

template< class T >
struct is_member_pointer;

std::is_member_pointer is a UnaryTypeTrait.

If T is pointer to non-static member object or a pointer to non-static member function, provides the member constant value equal true. For any other type, value is false.

The behavior of a program that adds specializations for std::is_member_pointer or std::is_member_pointer_v is undefined.

Template parameters

Helper variable template

template< class T >
inline constexpr bool is_member_pointer_v = is_member_pointer<T>::value;

Possible implementation

template<class T>
struct is_member_pointer_helper : std::false_type {};
 
template<class T, class U>
struct is_member_pointer_helper<T U::*> : std::true_type {};
 
template<class T>
struct is_member_pointer : is_member_pointer_helper<typename std::remove_cv<T>::type> {};

Example

#include <type_traits>
 
class C {};
static_assert(std::is_member_pointer_v<int(C::*)>);
 
static_assert(!std::is_member_pointer_v<int>);
 
int main()
{
}

See also