std::is_integral

 

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is_constructible is_trivially_constructible is_nothrow_constructible (C++11) (C++11) (C++11)
is_default_constructible is_trivially_default_constructible is_nothrow_default_constructible (C++11) (C++11) (C++11)
is_copy_constructible is_trivially_copy_constructible is_nothrow_copy_constructible (C++11) (C++11) (C++11)
is_move_constructible is_trivially_move_constructible is_nothrow_move_constructible (C++11) (C++11) (C++11)
is_assignable is_trivially_assignable is_nothrow_assignable (C++11) (C++11) (C++11)
is_copy_assignable is_trivially_copy_assignable is_nothrow_copy_assignable (C++11) (C++11) (C++11)
is_move_assignable is_trivially_move_assignable is_nothrow_move_assignable (C++11) (C++11) (C++11)
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Type trait constants
integral_constant (C++11)

 

Defined in header <type_traits>
template< class T > struct is_integral;		(since C++11)

Checks whether T is an integral type. Provides the member constant value which is equal to true, if T is the type bool, char, char16_t, char32_t, wchar_t, short, int, long, long long, including any signed, unsigned, and cv-qualified variants. Otherwise, value is equal to false.

Template parameters

T

-

a type to check

Inherited from std::integral_constant

Member constants

value [static]	true if T is an integral type , false otherwise (public static member constant)

Member functions

operator bool	converts the object to bool, returns value (public member function)

Member types

Type	Definition
value_type	bool
type	std::integral_constant<bool, value>

Example

run this code

#include <iostream>
#include <type_traits>
 
class A {};
 
int main() 
{
    std::cout << std::boolalpha;
    std::cout << std::is_integral<A>::value << '\n';
    std::cout << std::is_integral<float>::value << '\n';
    std::cout << std::is_integral<int>::value << '\n';
}

Output:

false
false
true

See also

is_integer [static]	identifies integer types (public static member constant of std::numeric_limits)
is_floating_point (C++11)	checks if a type is floating-point type (class template)
is_arithmetic (C++11)	checks if a type is arithmetic type (class template)