The std::is_trivially_copyable template of C++ STL is present in the <type_traits> header file. The std::is_trivially_copyable template of C++ STL is used to check whether T is trivially copyable type (a type whose storage is contiguous) or not. It return the boolean value true if T is trivially copyable type, otherwise return false.
Header File:
#include<type_traits>
Template Class:
template<class T> struct is_trivially_copyable;
Syntax:
std::is_trivially_copyable<T>::value
Parameter: The template std::is_trivially_copyable accepts a single parameter T(Trait class) to check whether T is trivially copyable type or not.
Return Value:The template std::is_trivially_copyable returns a boolean variable as shown below:
- True: If the type T is a trivially copyable.
- False: If the type T is not a trivially copyable.
Below is the program to demonstrate std::is_trivially_copyable template in C++:
Program:
// C++ program to illustrate // std::is_trivially_copyable #include <bits/stdc++.h> #include <type_traits> using namespace std;
// Declare structures struct X {
int a;
}; struct Y {
Y( const Y&) {}
}; struct Z {
virtual void GFG();
}; struct A {
~A() = delete ;
}; struct B : A {
}; // Driver Code int main()
{ cout << boolalpha;
// Check if X is a trivially
// copyable or not
cout << is_trivially_copyable<X>::value
<< endl;
// Check if Y is a trivially
// copyable or not
cout << is_trivially_copyable<Y>::value
<< endl;
// Check if Z is a trivially
// copyable or not
cout << is_trivially_copyable<Z>::value
<< endl;
// Check if A is a trivially
// copyable or not
cout << is_trivially_copyable<A>::value
<< endl;
// Check if B is a trivially
// copyable or not
cout << is_trivially_copyable<B>::value
<< endl;
return 0;
} |
true false false true true