template< class T >
struct is_arithmetic;
std::is_arithmetic is a UnaryTypeTrait.
If T is an arithmetic type (that is, an integral type or a floating-point type) or a cv-qualified version thereof, provides the member constant value equal to true. For any other type, value is false.
If the program adds specializations for std::is_arithmetic or std::is_arithmetic_v(since C++17), the behavior is undefined.
template< class T >
constexpr bool is_arithmetic_v = is_arithmetic<T>::value;
T is an arithmetic type, false otherwise
Arithmetic types are the built-in types for which the arithmetic operators (+, -, *, /) are defined (possibly in combination with the usual arithmetic conversions).
Specializations of std::numeric_limits are provided for all arithmetic types.
[edit] Possible implementation [edit] Example#include <atomic>
#include <cstddef>
#include <type_traits>
class A {};
enum class B : int { e };
static_assert(
std::is_arithmetic_v<bool> == true and
std::is_arithmetic_v<char> == true and
std::is_arithmetic_v<char const> == true and
std::is_arithmetic_v<int> == true and
std::is_arithmetic_v<int const> == true and
std::is_arithmetic_v<float> == true and
std::is_arithmetic_v<float const> == true and
std::is_arithmetic_v<std::size_t> == true and
std::is_arithmetic_v<char&> == false and
std::is_arithmetic_v<char*> == false and
std::is_arithmetic_v<int&> == false and
std::is_arithmetic_v<int*> == false and
std::is_arithmetic_v<float&> == false and
std::is_arithmetic_v<float*> == false and
std::is_arithmetic_v<A> == false and
std::is_arithmetic_v<B> == false and
std::is_arithmetic_v<decltype(B::e)> == false and
std::is_arithmetic_v<std::byte> == false and
std::is_arithmetic_v<std::atomic_int> == false
);
int main() {}[edit] See also
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