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std::numeri...has_infinity(3) C++ Standard Libarystd::numeri...has_infinity(3)

NAME
       std::numeric_limits::has_infinity - std::numeric_limits::has_infinity

Synopsis
	  static const bool has_infinity;      (until C++11)
	  static constexpr bool	has_infinity;  (since C++11)

	  The  value  of  std::numeric_limits<T>::has_infinity is true for all
       types T capable of
	  representing the positive infinity as	a distinct special value. This
       constant	is
	  meaningful for all floating-point types and is guaranteed to be true
       if
	  std::numeric_limits<T>::is_iec559 == true.

Standard specializations
	  T				      value    of    std::numeric_lim-
       its<T>::has_infinity
	  /* non-specialized */		   false
	  bool				   false
	  char				   false
	  signed char			   false
	  unsigned char			   false
	  wchar_t			   false
	  char8_t (since C++20)		   false
	  char16_t (since C++11)	   false
	  char32_t (since C++11)	   false
	  short				   false
	  unsigned short		   false
	  int				   false
	  unsigned int			   false
	  long				   false
	  unsigned long			   false
	  long long (since C++11)	   false
	  unsigned long	long (since C++11) false
	  float				   usually true
	  double			   usually true
	  long double			   usually true

Example
       // Run this code

	#include <iostream>
	#include <limits>

	int main()
	{
	    std::cout << std::boolalpha
		      << std::numeric_limits<int>::has_infinity	<< '\n'
		      << std::numeric_limits<long>::has_infinity << '\n'
		      << std::numeric_limits<float>::has_infinity << '\n'
		      << std::numeric_limits<double>::has_infinity << '\n';
	}

Possible output:
	false
	false
	true
	true

See also
	  infinity	     returns  the positive infinity value of the given
       floating-point
	  [static]	    type
			    (public static member function)
	  has_quiet_NaN	    identifies floating-point types that can represent
       the special
	  [static]	    value "quiet not-a-number" (NaN)
			    (public static member constant)
	  has_signaling_NaN identifies floating-point types that can represent
       the special
	  [static]	    value "signaling not-a-number" (NaN)
			    (public static member constant)

http://cppreference.com		  2024.06.10	 std::numeri...has_infinity(3)

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