std::integral

Defined in header <concepts> 
template< class T >
concept integral = std::is_integral_v<T>;
 (since C++20)

The concept integral<T> is satisfied if and only if T is an integral type.

Example

#include <concepts>
#include <iostream>
 
void print(std::integral auto i)
{
    std::cout << "Integral: " << i << '\n';
}
 
void print(auto x)
{
    std::cout << "Non-integral: " << x << '\n';
}
 
int main()
{
    std::cout << std::boolalpha;
 
    static_assert(std::integral<bool>);
    print(true);
 
    static_assert(std::integral<char>);
    print('o');
 
    static_assert(std::integral<int>);
    print(007);
 
    static_assert(!std::integral<double>);
    print(2e2);
 
    static_assert(!std::integral<decltype("")>);
    print("∫∫∫");
}

Output:

Integral: true
Integral: o
Integral: 7
Non-integral: 200
Non-integral: ∫∫∫

See also

(C++11)
 checks if a type is an integral type
(class template)

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