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std::basic_ostream::swap

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

 
 
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_ostream
Gli oggetti globali
Original:
Global objects
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Membri funzioni
Original:
Member functions
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basic_ostream::basic_ostream
basic_ostream::~basic_ostream
basic_ostream::operator=(C++11)
Ingresso formattato
Original:
Formatted input
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basic_ostream::operator<<
Ingresso non formattato
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Unformatted input
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basic_ostream::put
basic_ostream::write
Posizionamento
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Positioning
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basic_ostream::tellp
basic_ostream::seekp
Varie
Original:
Miscellaneous
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basic_ostream::flush
basic_ostream::swap(C++11)
Membri classi
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Member classes
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basic_ostream::sentry
Non membri funzioni
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Non-member functions
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operator<<(std::basic_ostream)
 
protected:
void swap(basic_ostream& rhs);
(dal C++11)
Chiamate basic_ios::swap(rhs) per scambiare tutti i membri dati della classe base, fatta eccezione per rdbuf(), tra *this e rhs. Questa funzione di swap è protetto: si chiama dalle funzioni di scambio delle classi swap flusso di output std::basic_ofstream e std::basic_ostringstream, che sanno scambiare correttamente le streambuffers associati.
Original:
Calls basic_ios::swap(rhs) to swap all data members of the base class, except for rdbuf(), between *this and rhs. This swap function is protected: it is called by the swap functions of the swappable output stream classes std::basic_ofstream and std::basic_ostringstream, which know how to correctly swap the associated streambuffers.
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[modifica] Parametri

rhs -
un basic_ostream dello stesso tipo di scambiare con
Original:
a basic_ostream of the same type to swap with
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[modifica] Esempio

#include <sstream>
#include <iostream>
#include <utility>
int main()
{
    std::ostringstream s1("hello");
    std::ostringstream s2("bye");
 
    s1.swap(s2); // OK, ostringstream has a public swap()
    std::swap(s1, s2); // OK, calls s1.swap(s2)
 
//  std::cout.swap(s2); // ERROR: swap is a protected member
 
    std::cout << s1.str() << '\n';
}

Output:

hello