The std::is_destructible template of C++ STL is present in the <type_traits> header file. The std::is_destructible template of C++ STL is used to check whether the T is destructible or not. A class is called destructible whose destructor is not deleted and potentially accessible in derived classes. It return the boolean value true if T is destructible type, otherwise return false.
Header File:
#include<type_traits>
Template Class:
template< class T > struct is_destructible;
Syntax:
std::is_destructible<T>::value
Parameter: The template std::is_destructible accepts a single parameter T(Trait class) to check whether T is destructible type or not.
Return Value: The template std::is_destructible returns a boolean variable as shown below:
- True: If the type T is a destructible type.
- False: If the type T is not a destructible type.
Below are the programs to demonstrate std::is_destructible in C++:
Program:
// C++ program to illustrate // std::is_destructible #include <bits/stdc++.h> #include <type_traits> using namespace std;
// Declare a structures struct X {
}; struct Y {
// Destructors
~Y() = delete ;
}; struct Z {
~Z() = default ;
}; struct A : Y {
}; // Driver Code int main()
{ cout << boolalpha;
// Check if int is destructible
// or not
cout << "int is destructible? "
<< is_destructible< int >::value
<< endl;
// Check if float is destructible
// or not
cout << "float is destructible? "
<< is_destructible< float >::value
<< endl;
// Check if struct X is
// destructible or not
cout << "struct X is destructible? "
<< is_destructible<X>::value
<< endl;
// Check if struct Y is
// destructible or not
cout << "struct Y is destructible? "
<< is_destructible<Y>::value
<< endl;
// Check if struct Z is
// destructible or not
cout << "struct Z is destructible? "
<< is_destructible<Z>::value
<< endl;
// Check if struct A is
// destructible or not
cout << "struct A is destructible? "
<< is_destructible<A>::value
<< endl;
return 0;
} |
int is destructible? true float is destructible? true struct X is destructible? true struct Y is destructible? false struct Z is destructible? true struct A is destructible? false
Reference: http://www.cplusplus.com/reference/type_traits/is_destructible/