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    std::is_floating_point

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

    std::is_floating_point is a UnaryTypeTrait.

    Checks whether T is a floating-point type. Provides the member constant value which is equal to true, if T is the type float, double, long double, or any extended floating-point types (std::float16_t, std::float32_t, std::float64_t, std::float128_t, or std::bfloat16_t)(since C++23), including any cv-qualified variants. Otherwise, value is equal to false.

    If the program adds specializations for std::is_floating_point or std::is_floating_point_v, the behavior is undefined.

    Template parameters

    T - a type to check

    Helper variable template

    template< class T > constexpr bool is_floating_point_v = is_floating_point<T>::value;
    		 (since C++17)
    [edit]

    Inherited from std::integral_constant

    Member constants

    value
    [static]
    		 true if T is a floating-point type (possibly cv-qualified), false otherwise
    (public static member constant)

    Member functions

    operator bool
    		 converts the object to bool, returns value
    (public member function)
    operator()
    (C++14)
    		 returns value
    (public member function)

    Member types

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

    Possible implementation

    template<class T>
struct is_floating_point
     : std::integral_constant<
         bool,
         // Note: standard floating-point types
         std::is_same<float, typename std::remove_cv<T>::type>::value
         || std::is_same<double, typename std::remove_cv<T>::type>::value
         || std::is_same<long double, typename std::remove_cv<T>::type>::value
         // Note: extended floating-point types (C++23, if supported)
         || std::is_same<std::float16_t, typename std::remove_cv<T>::type>::value
         || std::is_same<std::float32_t, typename std::remove_cv<T>::type>::value
         || std::is_same<std::float64_t, typename std::remove_cv<T>::type>::value
         || std::is_same<std::float128_t, typename std::remove_cv<T>::type>::value
         || std::is_same<std::bfloat16_t, typename std::remove_cv<T>::type>::value
     > {};

    Example

    Run this code
    #include <type_traits>

class A {};
static_assert(!std::is_floating_point_v<A>);

static_assert(std::is_floating_point_v<float>);
static_assert(!std::is_floating_point_v<float&>);
static_assert(std::is_floating_point_v<double>);
static_assert(!std::is_floating_point_v<double&>);
static_assert(!std::is_floating_point_v<int>);

int main() {}

    See also

    [static]
    		 identifies the IEC 559/IEEE 754 floating-point types
    (public static member constant of std::numeric_limits<T>) [edit]
    (C++11)
    		 checks if a type is an integral type
    (class template) [edit]
    (C++11)
    		 checks if a type is an arithmetic type
    (class template) [edit]
    (C++20)
    		 specifies that a type is a floating-point type
    (concept) [edit]