std::integral

Since C++20

Header: <concepts>

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

# Declarations

template< class T >
concept integral = std::is_integral_v<T>;

(since C++20)

# 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("∫∫∫");
}

# See also