std::istreambuf_iterator

 

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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 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
move_iterator (C++11) back_insert_iterator front_insert_iterator insert_iterator	make_move_iterator (C++11) back_inserter front_inserter inserter
Iteradores Stream 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
Operaciones 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)
Rango de acceso 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)

 

std::istreambuf_iterator

Las funciones miembro Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

istreambuf_iterator::istreambuf_iterator

istreambuf_iterator::operator* istreambuf_iterator::operator-> (C++11)

istreambuf_iterator::operator++ istreambuf_iterator::operator++(int)

istreambuf_iterator::equal

Terceros funciones Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

operator== operator!=

 

Defined in header <iterator>
template< class CharT, class Traits = std::char_traits<CharT> > class istreambuf_iterator : public std::iterator< std::input_iterator_tag,                                                   CharT,                                                   typename Traits::off_type,                                                   /* unspecified, usually CharT* */,                                                   CharT >

std::istreambuf_iterator es un iterador de entrada de un solo paso que lee los caracteres sucesivos desde el objeto std::basic_streambuf para la que fue construido. La operación de lectura real se realiza cuando el iterador no se incrementa, cuando se eliminan las referencias. El primer carácter puede ser leído cuando el iterador está construido o cuando la cancelación de referencia del primero que se hace. De lo contrario, desreferencia sólo devuelve una copia del personaje más leído recientemente .

Original:

std::istreambuf_iterator is a single-pass input iterator that reads successive characters from the std::basic_streambuf object for which it was constructed. The actual read operation is performed when the iterator is incremented, not when it is dereferenced. The first character may be read when the iterator is constructed or when the first dereferencing is done. Otherwise, dereferencing only returns a copy of the most recently read character.

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El valor predeterminado construido std::istreambuf_iterator se conoce como el de fin de flujo iterador. Cuando un std::istreambuf_iterator válido alcanza el final de la secuencia subyacente, se hace igual a la iterador de final de secuencia. Desreferenciación o incrementarlo aún más invoca un comportamiento indefinido .

Original:

The default-constructed std::istreambuf_iterator is known as the end-of-stream iterator. When a valid std::istreambuf_iterator reaches the end of the underlying stream, it becomes equal to the end-of-stream iterator. Dereferencing or incrementing it further invokes undefined behavior.

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std::istreambuf_iterator tiene un constructor copia trivial, un constructor predeterminado constexpr, y un destructor trivial .

Original:

std::istreambuf_iterator has a trivial copy constructor, a constexpr default constructor, and a trivial destructor.

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Tipos de miembros

Miembro de tipo Original: Member type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
char_type	CharT
traits_type	Traits
int_type	typename traits::int_type
streambuf_type	std::basic_streambuf<CharT, Traits>
istream_type	std::basic_istream<CharT, Traits>

Las funciones miembro

(constructor)	construye una nueva istreambuf_iterator Original: constructs a new istreambuf_iterator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función)
(destructor) (implícitamente declarado)	destructs an istreambuf_iterator (miembro público función)
operator* operator-> (ya que C + +11)	obtiene una copia de la corriente character accesses un miembro del carácter actual, si CharT tiene miembros Original: obtains a copy of the current character accesses a member of the current character, if CharT has members The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función)
operator++ operator++(int)	avanza la istreambuf_iterator Original: advances the istreambuf_iterator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función)
equal	si ambas pruebas son istreambuf_iterators final de corriente o si ambos son válidos Original: tests if both istreambuf_iterators are end-of-stream or if both are valid The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función)

Terceros funciones

operator== operator!=	compara dos istreambuf_iterators Original: compares two istreambuf_iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función de plantilla)

Inherited from std::iterator

Member types

Miembro de tipo Original: Member type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
value_type	CharT
difference_type	Traits::off_type
pointer	/* unspecified, usually CharT* */
reference	CharT
iterator_category	std::input_iterator_tag

Ejemplo

#include <vector>
#include <sstream>
#include <iostream>
#include <iterator>
int main()
{
    // typical use case: an input stream represented as a pair of iterators
    std::istringstream in("Hello, world");
    std::vector<char> v( (std::istreambuf_iterator<char>(in)),
                          std::istreambuf_iterator<char>() );
    std::cout << "v has " << v.size() << " bytes. ";
    v.push_back('\0');
    std::cout << "it holds \"" << &v[0] << "\"\n";
 
 
    // demonstration of the single-pass nature
    std::istringstream s("abc");
    std::istreambuf_iterator<char> i1(s), i2(s);
    std::cout << "i1 returns " << *i1 << '\n'
              << "i2 returns " << *i2 << '\n';
    ++i1;
    std::cout << "after incrementing i1, but not i2\n"
              << "i1 returns " << *i1 << '\n'
              << "i2 returns " << *i2 << '\n';
    ++i2; // this makes the apparent value of *i2 to jump from 'a' to 'c'
    std::cout << "after incrementing i2, but not i1\n"
              << "i1 returns " << *i1 << '\n'
              << "i2 returns " << *i2 << '\n';
 
}

Output:

v has 12 bytes. it holds "Hello, world"
i1 returns a
i2 returns a
after incrementing i1, but not i2
i1 returns b
i2 returns a
after incrementing i2, but not i1
i1 returns b
i2 returns c

Ver también

ostreambuf_iterator	salida iterador que escribe en std::basic_streambuf Original: output iterator that writes to std::basic_streambuf The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (clase de plantilla)
istream_iterator	iterador de entrada que se lee de std::basic_istream Original: input iterator that reads from std::basic_istream The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (clase de plantilla)