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std::basic_filebuf::close

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< cpp‎ | io‎ | basic filebuf

 
 
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Buffers
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Buffers
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(C++11)
 
std::basic_filebuf
Las funciones públicas miembros
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Public member functions
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basic_filebuf::close
Protegido funciones miembro
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Protected member functions
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Terceros funciones
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Non-member functions
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std::basic_filebuf<CharT, Traits>* close();

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().

Contenido

[editar] Parámetros

(Ninguno)
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(none)
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[editar] Valor de retorno

*this en caso de éxito, un puntero nulo en caso de fallo .
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*this on success, a null pointer on failure.
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[editar] 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.

[editar] Ejemplo

[editar] Ver también

checks if the associated file is open
(función miembro público) [editar]
[virtual]
destructs un objeto basic_filebuf y cierra el archivo si está abierto
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destructs a basic_filebuf object and closes the file if it is open
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(función miembro público virtual) [editar]