Espaços nominais
Variantes
Acções

std::input_iterator_tag, std::output_iterator_tag, std::forward_iterator_tag, std::bidirectional_iterator_tag, std::random_access_iterator_tag

Da cppreference.com
< cpp‎ | iterator

 
 
Biblioteca Iterator
Primitivas iterador
Original:
Iterator primitives
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
reverse_iterator
Iteradores fluxo
Original:
Stream iterators
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
istream_iterator
ostream_iterator
istreambuf_iterator
ostreambuf_iterator
Operações iterador
Original:
Iterator operations
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
advance
distance
prev(C++11)
next(C++11)
Variar de acesso
Original:
Range access
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
begin(C++11)
end(C++11)
 
Defined in header <iterator>
struct input_iterator_tag { };
struct output_iterator_tag { };
struct forward_iterator_tag : public input_iterator_tag { };
struct bidirectional_iterator_tag : public forward_iterator_tag { };
struct random_access_iterator_tag : public bidirectional_iterator_tag { };
Os tipos de vazios std::input_iterator_tag, std::output_iterator_tag, forward_iterator_tag, bidirectional_iterator_tag, e random_access_iterator_tag são usados ​​para selecionar algoritmos apropriados com base na categoria de um iterador. Para cada tipo de iterador, um std::iterator_traits<Iterator>::iterator_category typedef está disponível, o que é um alias para um desses tipos de marcas cinco.
Original:
The empty types std::input_iterator_tag, std::output_iterator_tag, forward_iterator_tag, bidirectional_iterator_tag, and random_access_iterator_tag are used to select appropriate algorithms based on the category of an iterator. For every iterator type, a typedef std::iterator_traits<Iterator>::iterator_category is available, which is an alias to one of these five tag types.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[editar] Exemplo

Técnica comum para a seleção algoritmo baseado em tags categoria iterador é usar uma função de despachante (a alternativa é std :: enable_if)
Original:
Common technique for algorithm selection based on iterator category tags is to use a dispatcher function (the alternative is std::enable_if)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <iostream>
#include <vector>
#include <list>
#include <iterator>
 
template< class BDIter >
void alg(BDIter, BDIter, std::bidirectional_iterator_tag)
{
    std::cout << "alg() called for bidirectional iterator\n";
}
 
template <class RAIter>
void alg(RAIter, RAIter, std::random_access_iterator_tag)
{
    std::cout << "alg() called for random-access iterator\n";
}
 
template< class Iter >
void alg(Iter first, Iter last)
{
    alg(first, last,
        typename std::iterator_traits<Iter>::iterator_category());
}
 
int main()
{
    std::vector<int> v;
    alg(v.begin(), v.end());
 
    std::list<int> l;
    alg(l.begin(), l.end());
 
//    std::istreambuf_iterator<char> i1(std::cin), i2;
//    alg(i1, i2); // compile error: no matching function for call
}

Output:

alg() called for random-access iterator
alg() called for bidirectional iterator

[editar] Veja também

o iterador básica
Original:
the basic iterator
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(modelo de classe) [edit]
fornece uma interface uniforme para as propriedades de uma iteração
Original:
provides uniform interface to the properties of an iterator
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(modelo de classe) [edit]