std is_object Template in C++

Last Updated : 19 Nov, 2018
The std::is_object template of C++ STL is used to check whether the given type is object or not. It returns a boolean value showing the same. Syntax: 
template <class T > struct is_object;
Parameter: This template accepts a single parameter T (Trait class) to check whether T is a object type or not. Return Value: This template returns a boolean value as shown below:
  • True: if the type is a object.
  • False: if the type is a non-object.
Below programs illustrate the std::is_object template in C++ STL: Program 1:: CPP 
// C++ program to illustrate
// std::is_object template

#include <iostream>
#include <type_traits>
using namespace std;

// main program
int main()
{
    class gfg {
    };

    cout << boolalpha;
    cout << "is_object:" << endl;
    cout << "sam: " << is_object<gfg>::value << '\n';
    cout << "sam&: " << is_object<gfg&>::value << '\n';
    cout << "int: " << is_object<int>::value << '\n';
    cout << "int&: " << is_object<int&>::value;
    return 0;
}
Output: 
is_object:
sam: true
sam&: false
int: true
int&: false
Program 2:: CPP 
// C++ program to illustrate
// std::is_object template

#include <iostream>
#include <type_traits>
using namespace std;

// main program
int main()
{
    class geeks {
    };

    cout << boolalpha;
    cout << "is_object:" << endl;
    cout << "float: " << is_object<float>::value << '\n';
    cout << "float&: " << is_object<float&>::value << '\n';
    cout << "raj: " << is_object<geeks>::value << '\n';
    cout << "raj&: " << is_object<geeks&>::value << '\n';
    cout << "char: " << is_object<char>::value << '\n';
    cout << "char&: " << is_object<char&>::value;

    return 0;
}
Output: 
is_object:
float: true
float&: false
raj: true
raj&: false
char: true
char&: false
Comment

Explore