home | help 
std::floating_point(3)	       C++ Standard Libary	  std::floating_point(3)

NAME
     std::floating_point - std::floating_point

Synopsis
	Defined in header <concepts>
	template< class T >				       (since C++20)
	concept floating_point = std::is_floating_point_v<T>;

	The  concept floating_point<T> is satisfied if and only if T is a float-
     ing-point
	type.

Example
     // Run this code

      #include <concepts>
      #include <iostream>
      #include <type_traits>

      constexpr std::floating_point auto x2(std::floating_point auto x)
      {
	  return x + x;
      }

      constexpr std::integral auto x2(std::integral auto x)
      {
	  return x << 1;
      }

      int main()
      {
	  constexpr auto d = x2(1.1);
	  static_assert(std::is_same_v<double const, decltype(d)>);
	  std::cout << d << '\n';

	  constexpr auto f = x2(2.2f);
	  static_assert(std::is_same_v<float const, decltype(f)>);
	  std::cout << f << '\n';

	  constexpr auto i = x2(444);
	  static_assert(std::is_same_v<int const, decltype(i)>);
	  std::cout << i << '\n';
      }

Output:
      2.2
      4.4
      888

See also
	is_floating_point checks if a type is a floating-point type
	(C++11) 	  (class template)

http://cppreference.com 	   2024.06.10		  std::floating_point(3)
home | help