std::is_member_pointer in C++ with Examples
The std::is_member_pointer template of C++ STL is present in the <type_traits> header file. The std::is_member_pointer template of C++ STL is used to check whether the T is a pointer to non-static member or not. It return the boolean value true if T is a pointer to non-static member type, Otherwise return false.
Header File:
#include<type_traits>
Template Class:
template<class T>
struct is_member_pointer
: std::integral_constant < bool,
is_member_object_pointer<T>::value
|| is_member_function_pointer<T>::value> {};
Syntax:
std::is_member_pointer::value
Parameters: The template std::is_member_pointer accepts a single parameter T(Trait class) to check whether T is pointer to non-static member or not.
Return Value: This template returns a boolean variable as shown below:
- True: If the type T is pointer to non-static member.
- False: If the type T is not a pointer to non-static member.
Below is the program to illustrates the std::is_member_pointer template in C/C++:
Program:
#include <bits/stdc++.h>
#include <type_traits>
using namespace std;
int main()
{
class GFG {
};
bool a = is_member_pointer< int (GFG::*)>::value;
if (a) {
cout << "GFG::* is a Member Pointer!"
<< endl;
}
else {
cout << "GFG::* is not a Member Pointer!"
<< endl;
}
a = is_member_pointer< int ( int )>::value;
if (a) {
cout << "int is a Member Pointer!"
<< endl;
}
else {
cout << "int is not a Member Pointer!"
<< endl;
}
return 0;
}
|
Output:
GFG::* is a Member Pointer!
int is not a Member Pointer!
Reference: http://www.cplusplus.com/reference/type_traits/is_member_pointer/
Last Updated :
12 Jun, 2020
Like Article
Save Article
Share your thoughts in the comments
Please Login to comment...