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std::vector<bool> – cppreference.com

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definiert in Header

<vector>

template<class Allocator = std::allocator<bool>> class vector<bool, Allocator>;

std::vector<bool> ist eine platzsparende Spezialisierung std::vector für die Art bool .

Original:

std::vector<bool> is a space-efficient specialization of std::vector for the type bool.

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Die Art, wie std::vector<bool> wird platzsparend (sowie, ob es überhaupt optimiert wird) ist die Umsetzung definiert. Eine mögliche Optimierung beinhaltet koaleszierende Vektorelemente so dass jedes Element ein einzelnes Bit anstelle eines Byte-Größe bool einnimmt .

Original:

The manner in which std::vector<bool> is made space efficient (as well as whether it is optimized at all) is implementation defined. One potential optimization involves coalescing vector elements such that each element occupies a single bit instead of a byte-sized bool.

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std::vector<bool> verhält sich ähnlich wie std::vector, aber um Platz effizient sein, sie:

Original:

std::vector<bool> behaves similarly to std::vector, but in order to be space efficient, it:

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  • Nicht unbedingt ihre Daten in einem einzigen zusammenhängenden Stück Speicher .

    Original:

    Does not necessarily store its data in a single contiguous chunk of memory.

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  • Freilegt std::vector<bool>::reference als Verfahren zum Zugriff auf einzelne Bits .

    Original:

    Exposes std::vector<bool>::reference as a method of accessing individual bits.

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  • Nicht std::allocator_traits::construct verwenden, um Bit-Werte zu konstruieren .

    Original:

    Does not use std::allocator_traits::construct to construct bit values.

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Mitglied Typen

Mitglied Typ

Original:

Member type

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 Definition
value_type bool [edit]
allocator_type Allocator [edit]
size_type implementierungsabhängig [edit]
difference_type

implementierungsabhängig

Original:

implementation-defined

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[edit]

Proxy-Klasse, die einen Verweis auf ein einzelnes bool

Original:

proxy class representing a reference to a single bool

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(Klasse)
const_reference bool [edit]
pointer

Implementierung definiert

Original:

implementation-defined

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[edit]
const_pointer

Implementierung definiert

Original:

implementation-defined

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[edit]
iterator

Implementierung definiert

Original:

implementation-defined

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[edit]
const_iterator

Implementierung definiert

Original:

implementation-defined

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[edit]
reverse_iterator std::reverse_iterator<iterator> [edit]
const_reverse_iterator std::reverse_iterator<const_iterator> [edit]

Member-Funktionen

konstruiert die vector
(öffentliche Elementfunktion of std::vector) [edit]
zerstört die vector
(öffentliche Elementfunktion of std::vector) [edit]

weist Werte auf den Behälter

Original:

assigns values to the container

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(öffentliche Elementfunktion of std::vector) [edit]

weist Werte auf den Behälter

Original:

assigns values to the container

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(öffentliche Elementfunktion of std::vector) [edit]
liefert den zugehörigen Allocator
(öffentliche Elementfunktion of std::vector) [edit]

Elementzugriff zerstört

Original:

Element access

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Zugriff auf angegebene Element mit Überprüfung von Grenzen

Original:

access specified element with bounds checking

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(öffentliche Elementfunktion of std::vector) [edit]

Zugriff auf angegebene Element

Original:

access specified element

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(öffentliche Elementfunktion of std::vector) [edit]

Zugriff auf das erste Element

Original:

access the first element

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(öffentliche Elementfunktion of std::vector) [edit]
Zugriff auf das letzte Element
(öffentliche Elementfunktion of std::vector) [edit]

Iteratoren

Original:

Iterators

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liefert einen Iterator an den Anfang

Original:

returns an iterator to the beginning

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(öffentliche Elementfunktion of std::vector) [edit]

liefert einen Iterator bis zum Ende

Original:

returns an iterator to the end

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(öffentliche Elementfunktion of std::vector) [edit]

gibt einen umgekehrten Iterator an den Anfang

Original:

returns a reverse iterator to the beginning

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(öffentliche Elementfunktion of std::vector) [edit]

gibt einen umgekehrten Iterator bis zum Ende

Original:

returns a reverse iterator to the end

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(öffentliche Elementfunktion of std::vector) [edit]

Kapazität

Original:

Capacity

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prüft, ob der Container leer ist

Original:

checks whether the container is empty

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(öffentliche Elementfunktion of std::vector) [edit]

liefert die Anzahl der Elemente

Original:

returns the number of elements

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(öffentliche Elementfunktion of std::vector) [edit]

gibt die maximal mögliche Anzahl von Elementen

Original:

returns the maximum possible number of elements

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(öffentliche Elementfunktion of std::vector) [edit]
reserviert Speicher
(öffentliche Elementfunktion of std::vector) [edit]

gibt die Anzahl der Elemente, die in derzeit zugewiesenen Speicher gehalten werden kann

Original:

returns the number of elements that can be held in currently allocated storage

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(öffentliche Elementfunktion of std::vector) [edit]

Modifiers

Original:

Modifiers

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löscht den Inhalt

Original:

clears the contents

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(öffentliche Elementfunktion of std::vector) [edit]

Elemente einfügen

Original:

inserts elements

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(öffentliche Elementfunktion of std::vector) [edit]

löscht Elemente

Original:

erases elements

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(öffentliche Elementfunktion of std::vector) [edit]

fügt Elemente am Ende

Original:

adds elements to the end

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(öffentliche Elementfunktion of std::vector) [edit]

entfernt das letzte Element

Original:

removes the last element

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(öffentliche Elementfunktion of std::vector) [edit]
ändert die Anzahl der gespeicherten Elemente
(öffentliche Elementfunktion of std::vector) [edit]

tauscht die Inhalte

Original:

swaps the contents

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(öffentliche Elementfunktion of std::vector) [edit]

vector<bool> Modifikatoren

Original:

vector<bool> specific modifiers

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flips all the bits
(öffentliche Elementfunktion) [edit]

[statisch]

Swaps zwei std::vector<bool>::references

Original:

swaps two std::vector<bool>::references

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(public static Elementfunktion) [edit]

Non-Member-Funktionen

Notes

Wenn die Größe des bitset bei der Kompilierung bekannt ist, kann std::bitset verwendet werden, die bietet einen umfangreicheren Satz von Member-Funktionen. Außerdem besteht boost::dynamic_bitset als Alternative zu std::vector<bool> .

Original:

If the size of the bitset is known at compile time, std::bitset may be used, which offers a richer set of member functions. In addition, boost::dynamic_bitset exists as an alternative to std::vector<bool>.

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