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std::numeri...s_quiet_NaN(3) C++ Standard Libary std::numeri...s_quiet_NaN(3) NAME std::numeric_limits::has_quiet_NaN - std::numeric_limits::has_quiet_NaN Synopsis static const bool has_quiet_NaN; (until C++11) static constexpr bool has_quiet_NaN; (since C++11) The value of std::numeric_limits<T>::has_quiet_NaN is true for all types T capable of representing the special value "Quiet Not-A-Number". This con- stant 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_quiet_NaN /* non-specialized */ false bool false char false signed char false unsigned char false wchar_t false char8_t (C++20) false char16_t (C++11) false char32_t (C++11) false short false unsigned short false int false unsigned int false long false unsigned long false long long (C++11) false unsigned long long (C++11) false float usually true double usually true long double usually true See also quiet_NaN returns a quiet NaN value of the given floating- point type [static] (public static member function) has_infinity identifies floating-point types that can represent the special [static] value "positive infinity" (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 2022.07.31 std::numeri...s_quiet_NaN(3)
NAME | Synopsis | Standard specializations | See also
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