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Showing content from https://en.cppreference.com/w/cpp/language/../types/is_member_object_pointer.html below:

std::is_member_object_pointer - cppreference.com

template< class T > struct is_member_object_pointer;

(since C++11)

std::is_member_object_pointer is a UnaryTypeTrait.

Checks whether T is a non-static member object pointer. Provides the member constant value which is equal to true, if T is a non-static member object pointer type. Otherwise, value is equal to false.

If the program adds specializations for std::is_member_object_pointer or std::is_member_object_pointer_v, the behavior is undefined.

[edit] Template parameters [edit] Helper variable template

template< class T > constexpr bool is_member_object_pointer_v = is_member_object_pointer<T>::value;

(since C++17) Inherited from std::integral_constant Member constants true if T is a pointer to member object, false otherwise
(public static member constant) Member functions converts the object to bool, returns value
(public member function) returns value
(public member function) Member types [edit] Possible implementation [edit] Example

#include <iostream>
#include <type_traits>
 
int main()
{
    class C {};
    std::cout << "Is member object pointer?\n" << std::boolalpha
              << std::is_member_object_pointer_v<int(C::*)>
              << ": int(C::*)\n"
              << std::is_member_object_pointer_v<int(C::*)()>
              << ": int(C::*)()\n";
}

Output:

Is member object pointer?
true: int(C::*)
false: int(C::*)()

[edit] See also

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