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std::numeric_limits::has_signaling_NaN

Da cppreference.com.

 
 
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static const bool has_signaling_NaN
(C fino + 11)
static constexpr bool has_signaling_NaN
(dal C++11)
Il valore di std::numeric_limits<T>::has_signaling_NaN è true per tutti i tipi T in grado di rappresentare il valore speciale "segnalazione Not-A-Number". Questa costante è significativo per tutti i tipi a virgola mobile ed è garantito per essere true se std::numeric_limits<T>::is_iec559 == true.
Original:
The value of std::numeric_limits<T>::has_signaling_NaN is true for all types T capable of representing the special value "Signaling 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.
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[modifica] Specializzazioni standard

T
valore di std::numeric_limits<T>::has_signaling_NaN
Original:
value of std::numeric_limits<T>::has_signaling_NaN
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/* 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
di solito true
Original:
usually true
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double
di solito true
Original:
usually true
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long double
di solito true
Original:
usually true
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[modifica] Vedi anche

[statico]
restituisce un valore NaN tranquilla di un dato tipo a virgola mobile
Original:
returns a quiet NaN value of the given floating-point type
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(public static membro funzione) [edit]
[statico]
identifica i tipi a virgola mobile che possono rappresentare la speciale "positive infinity" valore
Original:
identifies floating-point types that can represent the special value "positive infinity"
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(pubblico membro statico costante) [edit]
identifica i tipi a virgola mobile che possono rappresentare il valore speciale "tranquilla, non-a-number" (NaN)
Original:
identifies floating-point types that can represent the special value "quiet not-a-number" (NaN)
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(pubblico membro statico costante) [edit]