Espaços nominais
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std::reverse_iterator

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< cpp‎ | iterator

 
 
Biblioteca Iterator
Primitivas iterador
Original:
Iterator primitives
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iterator_traits
input_iterator_tag
output_iterator_tag
forward_iterator_tag
bidirectional_iterator_tag
random_access_iterator_tag
iterator
Adaptadores de iterador
Original:
Iterator adaptors
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reverse_iterator
Iteradores fluxo
Original:
Stream iterators
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istream_iterator
ostream_iterator
istreambuf_iterator
ostreambuf_iterator
Operações iterador
Original:
Iterator operations
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advance
distance
prev(C++11)
next(C++11)
Variar de acesso
Original:
Range access
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begin(C++11)
end(C++11)
 
std::reverse_iterator
Funções de membro
Original:
Member functions
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reverse_iterator::reverse_iterator
reverse_iterator::operator=
reverse_iterator::base
reverse_iterator::operator*
reverse_iterator::operator->
reverse_iterator::operator[]
reverse_iterator::operator++
reverse_iterator::operator+
reverse_iterator::operator+=
reverse_iterator::operator--
reverse_iterator::operator-
reverse_iterator::operator-=
Não-membros funções
Original:
Non-member functions
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operator==
operator!=
operator<
operator>
operator+
operator-
 
Defined in header <iterator>
template< class Iterator >

class reverse_iterator : public std::iterator<
                           typename std::iterator_traits<Iterator>::iterator_category,
                           typename std::iterator_traits<Iterator>::value_type,
                           typename std::iterator_traits<Iterator>::difference_type,
                           typename std::iterator_traits<Iterator>::pointer,

                           typename std::iterator_traits<Iterator>::reference >
std::reverse_iterator é um adaptador iterador que inverte a direção de um iterador determinado. Em outras palavras, quando fornecido com um iterador bidirecional, std::reverse_iterator produz um novo iterador que se move a partir do fim para o princípio da sequência definida pela iterador subjacente bidireccional.
Original:
std::reverse_iterator is an iterator adaptor that reverses the direction of a given iterator. In other words, when provided with a bidirectional iterator, std::reverse_iterator produces a new iterator that moves from the end to the beginning of the sequence defined by the underlying bidirectional iterator.
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Para uma r iterador reverso construído a partir de uma i iterador, o &*r == &*(i-1) relação é sempre verdadeiro, assim um iterador inverso construído a partir de um dereferences iterador um-passado-finais a para o último elemento de uma sequência.
Original:
For a reverse iterator r constructed from an iterator i, the relationship &*r == &*(i-1) is always true; thus a reverse iterator constructed from a one-past-the-end iterator dereferences to the last element in a sequence.
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Este é o iterador retornado por funções de membro rbegin() e rend() dos contêineres da biblioteca padrão.
Original:
This is the iterator returned by member functions rbegin() and rend() of the standard library containers.
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Índice

[editar] Tipos de membro

Tipo de membro
Original:
Member type
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Definition
iterator_type Iterator
difference_type std::iterator_traits<Iterator>::difference_type
pointer std::iterator_traits<Iterator>::pointer
reference std::iterator_traits<Iterator>::reference

[editar] Funções de membro

constrói um novo adaptador de iterador
Original:
constructs a new iterator adaptor
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(função pública membro) [edit]
atribui outro iterador
Original:
assigns another iterator
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(função pública membro) [edit]
acessa o iterador subjacente
Original:
accesses the underlying iterator
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(função pública membro) [edit]
acessa o elemento apontou-a
Original:
accesses the pointed-to element
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(função pública membro) [edit]
obtém rvalue referência ao elemento indexado
Original:
obtains rvalue reference to indexed element
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(função pública membro) [edit]
avanços ou diminui o iterador
Original:
advances or decrements the iterator
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(função pública membro) [edit]

[editar] Objetos Membros

Nome do membro
Original:
Member name
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Definition
current (protegido)
uma cópia do iterador base ()
Original:
a copy of the base() iterator
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Para além do valor corrente do iterador subjacente, uma implementação típica do std::reverse_iterator contém uma cópia decrementado do iterador subjacente, que é usado em dereferencing.
Original:
In addition to the current value of the underlying iterator, a typical implementation of std::reverse_iterator holds a decremented copy of the underlying iterator, which is used in dereferencing.
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[editar] Não-membros funções

compara os iteradores subjacentes
Original:
compares the underlying iterators
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(modelo de função) [edit]
avança o iterador
Original:
advances the iterator
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(modelo de função) [edit]
calcula a distância entre dois adaptadores iterador
Original:
computes the distance between two iterator adaptors
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(modelo de função) [edit]

Inherited from std::iterator

Member types

Tipo de membro
Original:
Member type
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Definition
value_type  std::iterator_traits<Iterator>::value_type
difference_type  std::iterator_traits<Iterator>::difference_type
pointer  std::iterator_traits<Iterator>::pointer
reference  std::iterator_traits<Iterator>::reference
iterator_category  std::iterator_traits<Iterator>::iterator_category

[editar] Exemplo

#include <iostream>
#include <string>
#include <iterator>
 
int main()
{
    std::string s = "Hello, world";
    std::reverse_iterator<std::string::iterator> r = s.rbegin();
    r[7] = 'O'; // replaces 'o' with 'O' 
    r += 7; // iterator now points at 'O'
    std::string rev(r, s.rend());
    std::cout << rev << '\n';
}

Output:

OlleH

[editar] Veja também

o iterador básica
Original:
the basic iterator
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(modelo de classe) [edit]