From cppreference.com
template<classT>structis_member_object_pointer;(since C++11)std::is_member_object_pointer is a
.
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.
Template parameters
T - a type to check Helper variable template
template<classT>constexprboolis_member_object_pointer_v=is_member_object_pointer<T>::value;(since C++17)Inherited from
Member constants
value
[static]
true if T is a pointer to member object, false otherwise
(public static member constant)Member functions
operator bool
converts the object to bool, returns value
(public member function)operator()
(C++14)
returns value
(public member function)Member types
Type Definition value_typebooltypestd::integral_constant<bool,value>Possible implementation
template<classT>structis_member_object_pointer:std::integral_constant<bool,std::is_member_pointer<T>::value&&!std::is_member_function_pointer<T>::value>{};Example
Run this code
#include<iostream>#include<type_traits>intmain(){classC{};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::*)() See also