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std::numeric_limits::is_iec559

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C++
 
Utilità libreria
Tipo di supporto (basic types, RTTI, type traits)
Gestione della memoria dinamica
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Programma di utilità
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Data e ora
Funzione oggetti
initializer_list(C++11)
bitset
hash(C++11)
Gli operatori relazionali
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Coppie e tuple
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
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Swap, forward and move
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Tipo di supporto
Tipi base
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Tipi fondamentali
Larghezza fissa interi tipi (C++11)
Limiti numerici
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numeric_limits
C numerico limita interfaccia
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is_constructible
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is_nothrow_constructible		(C++11)
(C++11)
(C++11)
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is_nothrow_default_constructible		(C++11)
(C++11)
(C++11)
is_copy_constructible
is_trivially_copy_constructible
is_nothrow_copy_constructible		(C++11)
(C++11)
(C++11)
is_move_constructible
is_trivially_move_constructible
is_nothrow_move_constructible		(C++11)
(C++11)
(C++11)
is_assignable
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is_nothrow_assignable		(C++11)
(C++11)
(C++11)
is_copy_assignable
is_trivially_copy_assignable
is_nothrow_copy_assignable		(C++11)
(C++11)
(C++11)
is_move_assignable
is_trivially_move_assignable
is_nothrow_move_assignable		(C++11)
(C++11)
(C++11)
is_destructible
is_trivially_destructible
is_nothrow_destructible		(C++11)
(C++11)
(C++11)
has_virtual_destructor(C++11)
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rank(C++11)
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(C++11)
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(C++11)
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make_signed(C++11)
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aligned_storage(C++11)
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enable_if(C++11)
conditional(C++11)
common_type(C++11)
underlying_type(C++11)
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Digitare costanti tratto
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Type trait constants
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integral_constant(C++11)
 
std::numeric_limits
Costanti statiche
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Static constants
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numeric_limits::is_specialized
numeric_limits::is_signed
numeric_limits::is_integer
numeric_limits::is_exact
numeric_limits::has_infinity
numeric_limits::has_quiet_NaN
numeric_limits::has_signaling_NaN
numeric_limits::has_denorm
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numeric_limits::round_style
numeric_limits::is_iec559
numeric_limits::is_bounded
numeric_limits::is_modulo
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numeric_limits::digits10
numeric_limits::max_digits10(C++11)
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numeric_limits::min_exponent
numeric_limits::min_exponent10
numeric_limits::max_exponent
numeric_limits::max_exponent10
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numeric_limits::tinyness_before
Funzioni membro statiche
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numeric_limits::min
numeric_limits::lowest(C++11)
numeric_limits::max
numeric_limits::epsilon
numeric_limits::round_error
numeric_limits::infinity
numeric_limits::quiet_NaN
numeric_limits::signaling_NaN
numeric_limits::denorm_min
Helper tipi
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Helper types
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float_round_style
float_denorm_style
 
static const bool is_iec559
 (fino al c++11)
static constexpr bool is_iec559
 (dal C++11)
Il valore di std::numeric_limits<T>::is_iec559 è true per tutti i tipi a virgola mobile T che soddisfano i requisiti della norma IEC 559 (IEEE 754) standard. Se std::numeric_limits<T>::is_iec559 è true, allora std::numeric_limits<T>::has_infinity, std::numeric_limits<T>::has_quiet_NaN, e sono anche std::numeric_limits<T>::has_signaling_NaN true.
Original:
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_limits<T>::has_quiet_NaN, and std::numeric_limits<T>::has_signaling_NaN are also true.
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[modifica] Specializzazioni standard

T
valore di std::numeric_limits<T>::is_iec559
Original:
value of std::numeric_limits<T>::is_iec559
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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]
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) [modifica]
[statico]
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) [modifica]
[statico]
identifica i tipi a virgola mobile che possono rappresentare il valore speciale "segnalazione non-a-number" (NaN)
Original:
identifies floating-point types that can represent the special value "signaling not-a-number" (NaN)
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(pubblico membro statico costante) [modifica]
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