std::is_member_object_pointer
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                    | Defined in header  <type_traits> | ||
| template< class T > struct is_member_object_pointer; | (since C++11) | |
Checks whether T is a non-static member object. Provides the member constant value which is equal to true, if T is a non-static member object type. Otherwise, value is equal to false.
| Contents | 
[edit] Template parameters
| T | - | a type to check | 
[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
| value [static] | true if Tis 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_type | bool | 
| type | std::integral_constant<bool, value> | 
[edit] Possible implementation
| template<class T> struct is_member_object_pointer : std::integral_constant< bool, std::is_member_pointer<T>::value && !std::is_member_function_pointer<T>::value > {}; | 
[edit] Example
| This section is incomplete Reason: simplify | 
Run this code
#include <iostream> #include <type_traits> int main() { class cls {}; std::cout << (std::is_member_object_pointer<int(cls::*)>::value ? "T is member object pointer" : "T is not a member object pointer") << '\n'; std::cout << (std::is_member_object_pointer<int(cls::*)()>::value ? "T is member object pointer" : "T is not a member object pointer") << '\n'; }
Output:
T is member object pointer T is not a member object pointer
[edit] See also
| (C++11) | checks if a type is a pointer type (class template) | 
| (C++11) | checks if a type is a pointer to a non-static member function or object (class template) | 
| (C++11) | checks if a type is a pointer to a non-static member function (class template) | 
| (library fundamentals TS) | variable template alias of std::is_member_object_pointer::value(variable template) | 


