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std::numeric_limits::traps

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C++
 
Utilities-Bibliothek
 
Geben Sie Unterstützung
Grundtypen
Original:
Basic types
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Grundtypen
Feste Breite Integer-Typen (C++11)
Numerische Grenzen
Original:
Numeric limits
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numeric_limits
C numerische begrenzt Schnittstelle
Laufzeit-Typinformationen
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Runtime type information
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Exterieur
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Type traits
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Primären Typ Kategorien
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Primary type categories
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is_void(C++11)
is_array(C++11)
is_pointer(C++11)
is_enum(C++11)
is_union(C++11)
is_class(C++11)
is_function(C++11)
is_object(C++11)
is_scalar(C++11)
is_compound(C++11)
is_integral(C++11)
is_floating_point(C++11)
is_fundamental(C++11)
is_arithmetic(C++11)
is_reference(C++11)
is_lvalue_reference(C++11)
is_rvalue_reference(C++11)
is_member_pointer(C++11)
is_member_object_pointer(C++11)
is_member_function_pointer(C++11)
Typ Eigenschaften
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Type properties
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is_const(C++11)
is_volatile(C++11)
is_pod(C++11)
is_empty(C++11)
is_polymorphic(C++11)
is_abstract(C++11)
Unterstützte Operationen
Original:
Supported operations
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is_constructible
is_trivially_constructible
is_nothrow_constructible		(C++11)
(C++11)
(C++11)
is_default_constructible
is_trivially_default_constructible
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
is_trivially_assignable
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)
Beziehungen und Eigentum Abfragen
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Relationships and property queries
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is_same(C++11)
is_base_of(C++11)
is_convertible(C++11)
alignment_of(C++11)
rank(C++11)
extent(C++11)
Typ Modifikationen
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Type modifications
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remove_cv
remove_const
remove_volatile		(C++11)
(C++11)
(C++11)
add_cv
add_const
add_volatile		(C++11)
(C++11)
(C++11)
make_signed(C++11)
make_unsigned(C++11)
Typ Transformationen
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Type transformations
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aligned_storage(C++11)
aligned_union(C++11)
decay(C++11)
enable_if(C++11)
conditional(C++11)
common_type(C++11)
underlying_type(C++11)
result_of(C++11)
Typ-Trait-Konstanten
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Type trait constants
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integral_constant(C++11)
 
std::numeric_limits
Statische Konstanten
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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
numeric_limits::has_denorm_loss
numeric_limits::round_style
numeric_limits::is_iec559
numeric_limits::is_bounded
numeric_limits::is_modulo
numeric_limits::digits
numeric_limits::digits10
numeric_limits::max_digits10(C++11)
numeric_limits::radix
numeric_limits::min_exponent
numeric_limits::min_exponent10
numeric_limits::max_exponent
numeric_limits::max_exponent10
numeric_limits::traps
numeric_limits::tinyness_before
Statische Member-Funktionen
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Static member functions
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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-Typen
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Helper types
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float_round_style
float_denorm_style
 
static const bool traps
 (bis C + +11)
static constexpr bool traps
 (seit C++11)
Der Wert ist std::numeric_limits<T>::traps true für alle arithmetischen Typen T, die mindestens einen Wert, der, wenn als Argument an eine arithmetische Operation verwendet wird, wird eine Falle erzeugen haben .
Original:
The value of std::numeric_limits<T>::traps is true for all arithmetic types T that have at least one value that, if used as an argument to an arithmetic operation, will generate a Falle.
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[Bearbeiten] Standard Spezialisierungen

T
Wert std::numeric_limits<T>::traps
Original:
value of std::numeric_limits<T>::traps
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/* non-specialized */ false
bool false
char
Regel true
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usually true
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signed char
Regel true
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usually true
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unsigned char
Regel true
Original:
usually true
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wchar_t
Regel true
Original:
usually true
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char16_t
Regel true
Original:
usually true
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char32_t
Regel true
Original:
usually true
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short
Regel true
Original:
usually true
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unsigned short
Regel true
Original:
usually true
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int
Regel true
Original:
usually true
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unsigned int
Regel true
Original:
usually true
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long
Regel true
Original:
usually true
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unsigned long
Regel true
Original:
usually true
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long long
Regel true
Original:
usually true
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unsigned long long
Regel true
Original:
usually true
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float
Regel false
Original:
usually false
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double
Regel false
Original:
usually false
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long double
Regel false
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usually false
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[Bearbeiten] Notes

Auf den meisten Plattformen Integer Division durch Null immer Fallen und std::numeric_limits<T>::traps ist true für alle Integer-Typen, die den Wert 0 zu unterstützen. Die Ausnahme ist die Art bool: obwohl Division durch false Fallen aufgrund der ganzheitlichen Förderung von bool um int, ist es die Null-Wert int dass Fallen. Null ist nicht ein Wert vom Typ bool .
Original:
On most platforms integer division by zero always traps, and std::numeric_limits<T>::traps is true for all integer types that support the value 0. The exception is the type bool: even though division by false traps due to integral promotion from bool to int, it is the zero-valued int that traps. Zero is not a value of type bool.
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Auf den meisten Plattformen kann Gleitkomma-Exceptions und ausgeschaltet Laufzeit (zB feenableexcept() unter Linux oder _controlfp unter Windows), in welchem ​​Fall der Wert std::numeric_limits<T>::traps für Fließkomma-Typen den Zustand des Floating-Point-Trapping Anlage bei spiegelt die Zeit des Programmstarts, die false ist auf den meisten modernen Systemen. Eine Ausnahme wäre eine DEC Alpha-Programm, wo es true wenn ohne -ieee zusammengestellt sein .
Original:
On most platforms, floating-point exceptions may be turned on and off at run time (e.g. feenableexcept() on Linux or _controlfp on Windows), in which case the value of std::numeric_limits<T>::traps for floating-point types reflects the state of floating-point trapping facility at the time of program startup, which is false on most modern systems. An exception would be a DEC Alpha program, where it is true if compiled without -ieee.
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[Bearbeiten] Siehe auch

Floating-Point-Umgebung
[statisch]
identifiziert Floating-Point-Typen, die tinyness erkennen, bevor Rundungen
Original:
identifies floating-point types that detect tinyness before rounding
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(public static Mitglied konstanten) [edit]
[statisch]
 identifies the floating-point types that detect loss of precision as denormalization loss rather than inexact result
(public static Mitglied konstanten) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/types/numeric_limits/traps&oldid=30346“