std::is_member_object_pointer
From Get docs
Cpp/docs/latest/types/is member object pointer
std::is_member_object_pointer
Defined in header <type_traits>
|
||
---|---|---|
|
(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
.
Template parameters
T | - | a type to check |
Helper variable template
|
(since C++17) |
Inherited from std::integral_constant
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_type
|
bool
|
type
|
std::integral_constant<bool, value>
|
Possible implementation
|
Example
#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
See also
(C++11) |
checks if a type is a pointer type (class template) |
(C++11) |
checks if a type is a pointer to an 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) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
http://en.cppreference.com/w/cpp/types/is_member_object_pointer