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std::is_arithmetic

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

If T is an arithmetic type (that is, an integral type or a floating-point type), provides the member constant value equal true. For any other type, value is false.

Contents

Inherited from std::integral_constant

Member constants

value
[static]
true if T is an arithmetic 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>

Notes

Arithmetic types are the types for which the built-in arithmetic operators (+, -, *, /) are defined (possibly in combination with the usual arithmetic conversions)

Specializations of std::numeric_limits are provided for all arithmetic types.

Possible implementation

template< class T >
struct is_arithmetic : std::integral_constant<bool,
                                              std::is_integral<T>::value ||
                                              std::is_floating_point<T>::value> {};

Example

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

Output:

false
true
false
false
true
false
false

See also

checks if a type is integral type
(class template) [edit]
checks if a type is floating-point type
(class template) [edit]