std::basic_ostream::basic_ostream
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<metanoindex/>
<tbody> </tbody> explicit basic_ostream( std::basic_streambuf<CharT, Traits>* sb ); |
(1) | |
protected: basic_ostream( const basic_ostream& rhs ) = delete; |
(2) | |
protected: basic_ostream( basic_ostream&& rhs ); |
(3) | (desde C++11) |
1)
Constrói o objeto
basic_ostream, atribuindo valores iniciais para a classe base chamando basic_ios::init(sb).Original:
Constructs the
basic_ostream object, assigning initial values to the base class by calling basic_ios::init(sb).The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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2)
O construtor de cópia é protegida, e é excluído. Fluxos de saída não são copiáveis .
Original:
The copy constructor is protected, and is deleted. Output streams are not copyable.
The text has been machine-translated via Google Translate.
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3)
O construtor usa
basic_ios<CharT, Traits>::move(rhs) movimento para mover todos os membros basic_ios, exceto para o rdbuf(), de rhs em *this. Esse construtor movimento é protegido: ele é chamado pelos construtores movimento de classes de fluxo de saída de móveis e std::basic_ofstream std::basic_ostringstream, que sabe como mover corretamente o streambuffer associado.Original:
The move constructor 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 output stream classes std::basic_ofstream and std::basic_ostringstream, which know how to correctly move the associated streambuffer.The text has been machine-translated via Google Translate.
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Parâmetros
| sb | - | streambuffer para usar como sequência de saída
Original: streambuffer to use as output sequence The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| rhs | - | basic_ostream para inicializar a partir de
Original: basic_ostream to initialize from The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Exemplo
#include <sstream>
#include <utility>
#include <iostream>
int main()
{
// std::ostream myout(std::cout); // ERROR: copy ctor is deleted
std::ostream myout(std::cout.rdbuf()); // OK: shares buffer with cout
// std::ostream s2(std::move(std::ostringstream() << 7.1)); // ERROR: move constructor
// is protected
std::ostringstream s2(std::move(std::ostringstream() << 7.1)); // OK: move ctor called
// through the derived class
myout << s2.str() << '\n';
}
Saída:
7.1