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std::basic_ostream::operator=

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< cpp‎ | io‎ | basic ostream

 
 
Entrada / salida de la biblioteca
I / O manipuladores
C-estilo I / O
Buffers
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Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleto)
Arroyos
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Streams
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Abstracciones
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
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basic_ifstream
basic_ofstream
basic_fstream
Cadena de I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
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Array I/O
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istrstream(obsoleto)
ostrstream(obsoleto)
strstream(obsoleto)
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Types
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streamoff
streamsize
fpos
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_ostream
Los objetos globales
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Las funciones miembro
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basic_ostream::basic_ostream
basic_ostream::~basic_ostream
basic_ostream::operator=(C++11)
Entrada con formato
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basic_ostream::operator<<
Entrada sin formato
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Unformatted input
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basic_ostream::put
basic_ostream::write
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basic_ostream::tellp
basic_ostream::seekp
Varios
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basic_ostream::flush
basic_ostream::swap(C++11)
Clases de miembros
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basic_ostream::sentry
Terceros funciones
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operator<<(std::basic_ostream)
 
protected:
basic_istream& operator=( const basic_ostream& rhs ) = delete;
(1)
protected:
basic_ostream& operator=( basic_ostream&& rhs );
(2) (desde C++11)

1) The copy assignment operator is protected, and is deleted. Output streams are not CopyAssignable.

2) The move assignment operator exchanges all data members of the base class, except for rdbuf(), with rhs, as if by calling swap(*rhs). This move assignment operator is protected: it is only called by the move assignment operators of the derived movable output stream classes std::basic_ofstream and std::basic_ostringstream, which know how to correctly move-assign the associated streambuffers.

[editar] Parámetros

rhs - the basic_ostream object from which to assign to *this

[editar] Ejemplo

#include <sstream>
#include <utility>
#include <iostream>
int main()
{
    std::ostringstream s;
//  std::cout = s;                             // ERROR: copy assignment operator is deleted
//  std::cout = std::move(s);                  // ERROR: move assignment operator is protected
    s = std::move(std::ostringstream() << 42); // OK, moved through derived
    std::cout << s.str() << '\n';
}

Output:

42