std::basic_filebuf::overflow – cppreference.com

std::basic_filebuf::overflow

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C++
 
Input / Output-Bibliothek
I / O-Manipulatoren
C-style I / O
Puffern
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Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(veraltet)
Streams
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Streams
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Abstraktionen
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Datei-I / O
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
String I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
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Array I/O
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istrstream(veraltet)
ostrstream(veraltet)
strstream(veraltet)
Types
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Types
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streamoff
streamsize
fpos
Fehler Kategorie Schnittstelle
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_filebuf
Öffentliche Member-Funktionen
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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
Geschützt Member-Funktionen
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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-Member-Funktionen
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Non-member functions
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swap(std::basic_filebuf)(C++11)
 
<tbody> </tbody>
protected: virtual int_type overflow ( int_type c = Traits::eof() );
Verhält sich wie die Basisklasse std::basic_streambuf::overflow, außer dass die Daten aus der Put Bereich der zugeordneten Zeichenfolge (an der Datei) einzutragen, verwendet zuerst codecvt::out() des durchdrungen Gebietsschema, um die Zeichen in äußere (möglicherweise Multibyte) Darstellung, in einer Datenbank gespeichert zu konvertieren temporären Puffer (zugeteilten so groß wie nötig), dann verwendet Datei-I / O, alle voll konvertierten Bytes in der Datei kopieren .
Original:
Behaves like the base class std::basic_streambuf::overflow, except that to write the data from the put area to the associated character sequence (to the file), first uses codecvt::out() of the imbued locale to convert the characters into external (possibly multibyte) representation, stored in a temporary buffer (allocated as large as necessary), then uses file I/O to copy all fully-converted bytes into the file.
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Wenn die Konvertierung fehlschlägt mit std::codecvt_base::error, gibt Traits::eof() ohne zu versuchen, jede Ausgabe .
Original:
If the conversion fails with std::codecvt_base::error, returns Traits::eof() without attempting any output.
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Wenn die zugehörige Datei nicht geöffnet ist (is_open()==false, gibt Traits::eof(), bevor Sie etwas .
Original:
If the associated file is not open (is_open()==false, returns Traits::eof() before doing anything.
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Parameter

(None)
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(none)
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Rückgabewert

Traits::not_eof(c) um Erfolg oder Traits::eof() zeigen zum Scheitern .
Original:
Traits::not_eof(c) to indicate success or Traits::eof() to indicate failure.
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Beispiel

This section is incomplete
Reason: no example

Siehe auch