std::numeric_limits::has_quiet_NaN
From cppreference.com
< cpp | types | numeric limits
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 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_limits<T>::has_quiet_NaN |
/* non-specialized */ | false |
bool | false |
char | false |
signed char | false |
unsigned char | false |
wchar_t | false |
char16_t | false |
char32_t | false |
short | false |
unsigned short | false |
int | false |
unsigned int | false |
long | false |
unsigned long | false |
long long | false |
unsigned long long | false |
float | usually true |
double | usually true |
long double | usually true |
See also
[static] |
returns a quiet NaN value of the given floating-point type (public static member function) |
[static] |
identifies floating-point types that can represent the special value "positive infinity" (public static member constant) |
[static] |
identifies floating-point types that can represent the special value "signaling not-a-number" (NaN) (public static member constant) |