std::remove_const in C++ with Examples
The std::remove_const template of C++ STL is present in the <type_traits> header file. The std::remove_const template of C++ STL is used to get the type T without const qualification. It return the boolean value true if T is without const qualified, otherwise return false. Below is the syntax for the same:
Header File:
#include<type_traits>
Template Class:
template <class T>
struct remove_const;
Syntax:
std::remove_const<T>::value
Parameter: This template std::remove_const accepts a single parameter T(Trait class) to check whether T is without const qualified or not.
Return Value: The template std::remove_const returns a boolean value:
- True: If type T is without const qualified.
- False: If type T is with const qualified.
Below is the program to demonstrate std::remove_const in C++:
Program:
#include <bits/stdc++.h>
#include <type_traits>
using namespace std;
int main()
{
typedef remove_const< int >::type A;
typedef remove_const< const int >::type B;
typedef remove_const< const int *>::type C;
typedef remove_const< int * const >::type D;
typedef remove_const< const int &>::type E;
cout << std::boolalpha;
cout << "A is without const int? "
<< is_same< int , A>::value
<< endl;
cout << "B is without const int? "
<< is_same< int , B>::value
<< endl;
cout << "C is without const int? "
<< is_same< int , C>::value
<< endl;
cout << "D is without const int? "
<< is_same< int , D>::value
<< endl;
cout << "E is without const int? "
<< is_same< const int , E>::value
<< endl;
return 0;
}
|
Output:
A is without const int? true
B is without const int? true
C is without const int? false
D is without const int? false
E is without const int? false
Reference: http://www.cplusplus.com/reference/type_traits/remove_const/
Last Updated :
21 Jun, 2020
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