From cppreference.com
template<classT>structis_floating_point;(since C++11)std::is_floating_point is a
.
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, longdouble, or any
(std::float16_t, std::float32_t, std::float64_t, std::float128_t, or std::bfloat16_t)(since C++23), including any
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<classT>constexprboolis_floating_point_v=is_floating_point<T>::value;(since C++17)Inherited from
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_typebooltypestd::integral_constant<bool,value>Possible implementation
template<classT>structis_floating_point:std::integral_constant<bool,// Note: standard floating-point typesstd::is_same<float,typenamestd::remove_cv<T>::type>::value||std::is_same<double,typenamestd::remove_cv<T>::type>::value||std::is_same<longdouble,typenamestd::remove_cv<T>::type>::value// Note: extended floating-point types (C++23, if supported)||std::is_same<std::float16_t,typenamestd::remove_cv<T>::type>::value||std::is_same<std::float32_t,typenamestd::remove_cv<T>::type>::value||std::is_same<std::float64_t,typenamestd::remove_cv<T>::type>::value||std::is_same<std::float128_t,typenamestd::remove_cv<T>::type>::value||std::is_same<std::bfloat16_t,typenamestd::remove_cv<T>::type>::value>{};Example
Run this code
#include<type_traits>classA{};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>);intmain(){}See also