std::basic_filebuf::close
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std::basic_filebuf<CharT, Traits>* close(); |
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If a put area exist (e.g. file was opened for writing), first calls overflow(Traits::eof()) to write all pending output to the file, including any unshift sequences.
If the most recently called function, out of underflow(), overflow(), seekpos(), and seekoff(), was overflow(), then calls std::codecvt::unshift(), perhaps multiple times, to determine the unshift sequence according to the imbued locale, and writes that sequence to file with overflow(Traits::eof()).
Then, closes the file as if by calling std::fclose, regardless of whether any of the preceding calls succeeded or failed.
If any of the function calls made, including the call to std::fclose, fails, returns a null pointer. If any of the function calls made throws an exception, the exception is caught and rethrown after calling std::fclose. If the file is already closed, returns a null pointer right away.
In any case, updates the private member variable that is accessed by is_open().
Parámetros
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Valor de retorno
*this en caso de éxito, un puntero nulo en caso de fallo .*this on success, a null pointer on failure.You can help to correct and verify the translation. Click here for instructions.
Notas
close() is typically called through the destructor of std::basic_filebuf (which, in turn, is typically called by the destructor of std::basic_fstream.
Ejemplo
| Esta sección está incompleta Razón: sin ejemplo |
Ver también
| checks if the associated file is open (función miembro pública) | |
[virtual] |
destructs un objeto basic_filebuf y cierra el archivo si está abierto Original: destructs a basic_filebuf object and closes the file if it is open The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función miembro virtual pública) |