Varianti

    std::basic_filebuf::close

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    <metanoindex/>

     
    C++
     
    Ingresso / libreria di output
    I / O manipolatori
    C-style I / O
    Buffer
    Original:
    Buffers
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    basic_streambuf
    basic_filebuf
    basic_stringbuf
    strstreambuf(deprecato)
    Streams
    Original:
    Streams
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    Astrazioni
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    Abstractions
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    ios_base
    basic_ios
    basic_istream
    basic_ostream
    basic_iostream
    File I / O
    Original:
    File I/O
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    basic_ifstream
    basic_ofstream
    basic_fstream
    String I / O
    Original:
    String I/O
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    basic_istringstream
    basic_ostringstream
    basic_stringstream
    Array I / O
    Original:
    Array I/O
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    istrstream(deprecato)
    ostrstream(deprecato)
    strstream(deprecato)
    Tipi
    Original:
    Types
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    streamoff
    streamsize
    fpos
    Errore categoria interfaccia
    Original:
    Error category interface
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    iostream_category(C++11)
    io_errc(C++11)
     
    std::basic_filebuf
    Funzioni membro pubbliche
    Original:
    Public member functions
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    basic_filebuf::basic_filebuf
    basic_filebuf::~basic_filebuf
    basic_filebuf::operator=(C++11)
    basic_filebuf::swap(C++11)
    basic_filebuf::is_open
    basic_filebuf::open
    basic_filebuf::close
    Protetto funzioni membro
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    Protected member functions
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    basic_filebuf::showmanyc
    basic_filebuf::underflow
    basic_filebuf::uflow
    basic_filebuf::pbackfail
    basic_filebuf::overflow
    basic_filebuf::setbuf
    basic_filebuf::seekoff
    basic_filebuf::seekpos
    basic_filebuf::sync
    basic_filebuf::imbue
    Non membri funzioni
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    Non-member functions
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    swap(std::basic_filebuf)(C++11)
     
    <tbody> </tbody>
    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().

    Parametri

    (Nessuno)
    Original:
    (none)
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    Valore di ritorno

    *this in caso di successo, un puntatore nullo in caso di errore.
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    *this on success, a null pointer on failure.
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    Note

    close() is typically called through the destructor of std::basic_filebuf (which, in turn, is typically called by the destructor of std::basic_fstream.

    Esempio

    This section is incomplete
    Reason: no example

    Vedi anche

    		 checks if the associated file is open
    (metodo pubblico) [modifica]
    [virtuale]
    distrugge un oggetto basic_filebuf e chiude il file se è aperto
    Original:
    destructs a basic_filebuf object and closes the file if it is open
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    (metodo pubblico virtuale) [modifica]