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class template

<type_traits>

std::is_member_object_pointer

template <class T> struct is_member_object_pointer;

Is member object pointer


Trait class that identifies whether T is a pointer to a non-static data member.

It inherits from integral_constant as being either true_type or false_type.


Template parameters

T
A type.

Member types

Inherited from integral_constant:
member typedefinition
value_typebool
typeeither true_type or false_type

Member constants

Inherited from integral_constant:
member constantdefinition
valueeither true or false

Member functions

Inherited from integral_constant:
operator bool
Returns value (public member function)

Example

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// is_member_object_pointer example
#include <iostream>
#include <type_traits>

struct A { int x; };

int main() {
  int A::* pt = &A::x;
  std::cout << std::boolalpha;
  std::cout << "is_member_object_pointer:" << std::endl;
  std::cout << "A*: " << std::is_member_object_pointer<A*>::value << std::endl;
  std::cout << "int A::*: " << std::is_member_object_pointer<int A::*>::value << std::endl;
  std::cout << "decltype(pt): " << std::is_member_object_pointer<decltype(pt)>::value << std::endl;
  return 0;
}

Output:
is_member_object_pointer:
A*: false
int A::*: true
decltype(pt): true


See also

is_pointer
Is pointer (class template)
is_member_function_pointer
Is member function pointer (class template)
is_member_pointer
Is member pointer type (class template)