std::is_integral template in C++
Last Updated :
19 Nov, 2018
The std::is_integral template of C++ STL is used to check whether the given type is integral or not. It returns a boolean value showing the same.
Syntax:
template <class T> struct is_integral;
Template Parameter: This template accepts a single parameter T (Trait class) to check whether T is a integral type or not.
Return Value: This template returns a boolean value as shown below:
- true: if the type is a integral.
- false: if the type is a non-integral.
Below programs illustrate the std::is_integral template in C++:
Program 1::
#include <iostream>
#include <type_traits>
using namespace std;
int main()
{
cout << boolalpha;
cout << "is_integral:" << endl;
cout << "char: " << is_integral
< char >::value << endl;
cout << "int: " << is_integral
< int >::value << endl;
cout << "float: " << is_integral
< float >::value << endl;
return 0;
}
|
Output:
is_integral:
char: true
int: true
float: false
Program 2::
#include <iostream>
#include <type_traits>
using namespace std;
int main()
{
cout << boolalpha;
cout << "is_integral:" << endl;
cout << "double: " << is_integral
< double >::value << endl;
cout << "bool: " << is_integral
< bool >::value << endl;
cout << "long int: " << is_integral
< long int >::value << endl;
return 0;
}
|
Output:
is_integral:
double: false
bool: true
long int: true
Program 3::
#include <iostream>
#include <type_traits>
using namespace std;
int main()
{
cout << boolalpha;
cout << "is_integral:" << endl;
cout << "wchar_t: " << is_integral
< wchar_t >::value << endl;
cout << "long double: " << is_integral
< long double >::value << endl;
cout << "unsigned short int: " << is_integral
<unsigned short int >::value << endl;
return 0;
}
|
Output:
is_integral:
wchar_t: true
long double: false
unsigned short int: true
Share your thoughts in the comments
Please Login to comment...