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std::numeri...::is_iec559(3)  C++ Standard Libary std::numeri...::is_iec559(3)

NAME
       std::numeric_limits::is_iec559 -	std::numeric_limits::is_iec559

Synopsis
	  static const bool is_iec559;	    (until C++11)
	  static constexpr bool	is_iec559;  (since C++11)

	  The  value  of  std::numeric_limits<T>::is_iec559  is	 true  for all
       floating-point types
	  T which fulfill the requirements of IEC 559 (IEEE 754) standard. If
	  std::numeric_limits<T>::is_iec559 is true, then
	  std::numeric_limits<T>::has_infinity,		     std::numeric_lim-
       its<T>::has_quiet_NaN, and
	  std::numeric_limits<T>::has_signaling_NaN are	also true.

Standard specializations
	  T				      value    of    std::numeric_lim-
       its<T>::is_iec559
	  /* 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

See also
	  has_infinity	    identifies floating-point types that can represent
       the special
	  [static]	    value "positive infinity"
			    (public static member constant)
	  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...::is_iec559(3)

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