Namespace
Varianti

std::basic_istream::basic_istream

Da cppreference.com.
< cpp‎ | io‎ | basic istream

 
 
Ingresso / libreria di output
I / O manipolatori
C-style I / O
Buffer
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(deprecato)
Streams
Original:
Streams
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Astrazioni
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
String I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
Original:
Array I/O
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istrstream(deprecato)
ostrstream(deprecato)
strstream(deprecato)
Tipi
Original:
Types
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streamoff
streamsize
fpos
Errore categoria interfaccia
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_istream
Gli oggetti globali
Original:
Global objects
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cin
wcin
Membri funzioni
Original:
Member functions
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basic_istream::basic_istream
basic_istream::~basic_istream
basic_istream::operator=(C++11)
Ingresso formattato
Original:
Formatted input
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basic_istream::operator>>
Ingresso non formattato
Original:
Unformatted input
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basic_istream::get
basic_istream::peek
basic_istream::unget
basic_istream::putback
basic_istream::getline
basic_istream::ignore
basic_istream::read
basic_istream::readsome
basic_istream::gcount
Posizionamento
Original:
Positioning
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basic_istream::tellg
basic_istream::seekg
Varie
Original:
Miscellaneous
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basic_istream::sync
basic_istream::swap(C++11)
Membri classi
Original:
Member classes
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basic_istream::sentry
Non membri funzioni
Original:
Non-member functions
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operator>>(std::basic_istream)
 
explicit basic_istream( std::basic_streambuf<CharT,Traits>* sb);
(1)
protected:
basic_istream( const basic_istream& rhs ) = delete;
(2)
protected:
basic_istream( basic_istream&& rhs );
(3) (dal C++11)
1)
Costruisce l'oggetto basic_istream, l'assegnazione di valori iniziali per la classe base chiamando basic_ios::init(sb). Il valore di gcount() viene inizializzato a zero.
Original:
Constructs the basic_istream object, assigning initial values to the base class by calling basic_ios::init(sb). The value of gcount() is initialized to zero.
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2)
Il costruttore di copia è protetto, e viene eliminato. Flussi di ingresso non sono copiabili.
Original:
The copy constructor is protected, and is deleted. Input streams are not copyable.
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3)
Il costruttore mossa copia il valore di gcount() da rhs, imposta il gcount () valore sd a zero, e usa basic_ios<charT, traits>::move(rhs) per spostare tutti i membri basic_ios, fatta eccezione per la rdbuf(), da rhs in *this. Questo costruttore mossa è protetta: viene chiamato dai costruttori movimento delle classi mobili flusso di input e std::basic_ifstream std::basic_istringstream, che sa come muoversi correttamente il streambuffer associato.
Original:
The move constructor copies the value of gcount() from rhs, sets the gcount() value of rhs to zero, and uses basic_ios<charT, traits>::move(rhs) to move all basic_ios members, except for the rdbuf(), from rhs into *this. This move constructor is protected: it is called by the move constructors of movable input stream classes std::basic_ifstream and std::basic_istringstream, which know how to correctly move the associated streambuffer.
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[modifica] Parametri

sb -
streambuffer da usare come dispositivo sottostante
Original:
streambuffer to use as underlying device
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[modifica] Esempio

#include <sstream>
#include <iostream>
int main()
{
    std::istringstream s1("hello");
    std::istream s2(s1.rdbuf());                        // OK: s2 shares the buffer with s1
 
//    std::istream s3(std::istringstream("test"));      // ERROR: move constructor is protected
//    std::istream s4(s2);                              // ERROR: copy constructor is deleted
    std::istringstream s5(std::istringstream("world")); // OK: move ctor called by derived class
 
    std::cout << s2.rdbuf() << ' ' << s5.rdbuf() << '\n';
}

Output:

hello world