std::basic_filebuf::is_open
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<metanoindex/>
<tbody> </tbody> bool is_open() const; |
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Retorna
true se a chamada mais recente para open() sucesso e não houve nenhuma chamada para close() desde então.Original:
Returns
true if the most recent call to open() succeeded and there has been no call to close() since then.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Parâmetros
(Nenhum)
Original:
(none)
The text has been machine-translated via Google Translate.
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Valor de retorno
true se o arquivo associado é aberto, caso contrário false.Original:
true if the associated file is open, false otherwise.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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Notas
Esta função é geralmente chamado por
std::basic_fstream::is_open.Original:
This function is typically called by
std::basic_fstream::is_open.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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Exemplo
#include <fstream>
#include <iostream>
int main()
{
std::ifstream fs("test.txt");
std::filebuf fb;
fb.open("test.txt", std::ios_base::in);
std::cout << std::boolalpha
<< "direct call: " << fb.is_open() << '\n'
<< "through streambuf: " << fs.rdbuf()->is_open() << '\n'
<< "through fstream: " << fs.is_open() << '\n';
}
Saída:
direct call: true
through streambuf: true
through fstream: true
Veja também
abre um arquivo e configura como a seqüência de caracteres associado Original: opens a file and configures it as the associated character sequence The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) | |
esvaziará o buffer área e colocar fecha o arquivo associado Original: flushes the put area buffer and closes the associated file The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) | |
