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      std::numeric_limits<T>::has_quiet_NaN

      From cppreference.com
      <cpp‎ |types‎ |numeric limits
       
       
      Utilities library
       
       
      std::numeric_limits
      Static constants
      numeric_limits::has_quiet_NaN
      Static member functions
      Helper types
       
      staticconstbool has_quiet_NaN;
      		(until C++11)
      staticconstexprbool has_quiet_NaN;
      		(since C++11)

      The value ofstd::numeric_limits<T>::has_quiet_NaN istrue for all typesT capable of representing the special value "QuietNot-A-Number". This constant is meaningful for all floating-point types and is guaranteed to betrue ifstd::numeric_limits<T>::is_iec559==true.

      [edit]Standard specializations

      T value ofstd::numeric_limits<T>::has_quiet_NaN
      /* non-specialized */false
      boolfalse
      charfalse
      signedcharfalse
      unsignedcharfalse
      wchar_tfalse
      char8_t(since C++20)false
      char16_t(since C++11)false
      char32_t(since C++11)false
      shortfalse
      unsignedshortfalse
      intfalse
      unsignedintfalse
      longfalse
      unsignedlongfalse
      longlong(since C++11)false
      unsignedlonglong(since C++11)false
      float usuallytrue
      double usuallytrue
      longdouble usuallytrue

      [edit]See also

      [static]
      		 returns a quiet NaN value of the given floating-point type
      (public static member function)[edit]
      [static]
      		 identifies floating-point types that can represent the special value "positive infinity"
      (public static member constant)[edit]
      identifies floating-point types that can represent the special value "signaling not-a-number" (NaN)
      (public static member constant)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/types/numeric_limits/has_quiet_NaN&oldid=148378"
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