is_member_object_pointer Class

Article
08/03/2021

Tests if type is a pointer to member object.

Syntax

template <class Ty>
struct is_member_object_pointer;

Parameters

Ty
The type to query.

Remarks

An instance of the type predicate holds true if the type Ty is a pointer to member object or a cv-qualified pointer to member object, otherwise it holds false. Note that is_member_object_pointer holds false if Ty is a pointer to member function.

Example

// std__type_traits__is_member_object_pointer.cpp
// compile with: /EHsc
#include <type_traits>
#include <iostream>

struct trivial
    {
    int val;
    };

struct functional
    {
    int f();
    };

int main()
    {
    std::cout << "is_member_object_pointer<trivial *> == "
        << std::boolalpha
        << std::is_member_object_pointer<trivial *>::value
        << std::endl;
    std::cout << "is_member_object_pointer<int trivial::*> == "
        << std::boolalpha
        << std::is_member_object_pointer<int trivial::*>::value
        << std::endl;
    std::cout << "is_member_object_pointer<int (functional::*)()> == "
        << std::boolalpha
        << std::is_member_object_pointer<int (functional::*)()>::value
        << std::endl;

    return (0);
    }

is_member_object_pointer<trivial *> == false
is_member_object_pointer<int trivial::*> == true
is_member_object_pointer<int (functional::*)()> == false

Requirements

Header: <type_traits>

Namespace: std