std::basic_filebuf::pbackfail

 

C++

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Libreria di Utilità

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Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Ingresso / libreria di output

I / O manipolatori

C-style I / O

Buffer Original: Buffers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_streambuf

basic_filebuf

basic_stringbuf

strstreambuf (deprecato)

Streams Original: Streams The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Astrazioni Original: Abstractions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

ios_base

basic_ios

basic_istream

basic_ostream

basic_iostream

File I / O Original: File I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_ifstream

basic_ofstream

basic_fstream

String I / O Original: String I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istringstream

basic_ostringstream

basic_stringstream

Array I / O Original: Array I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

istrstream (deprecato)

ostrstream (deprecato)

strstream (deprecato)

Tipi Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

streamoff

streamsize

fpos

Errore categoria interfaccia Original: Error category interface The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iostream_category (C++11)

io_errc (C++11)

 

std::basic_filebuf

Funzioni membro pubbliche Original: Public member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 Original: Protected member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

swap(std::basic_filebuf) (C++11)

 

protected: virtual int_type pbackfail( int_type c = Traits::eof())

Mette il carattere c indietro nell'area get, in uno dei tre modi:

Original:

Puts the character c back into the get area, in one of the three ways:

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1)

c se non è il carattere EOF, come determinato chiamando Traits::eq_int_type(c,traits::eof()) e se vi è spazio per un putback, e se c è esattamente il personaggio che è stato più recentemente letto dalla zona get, come determinato da Traits::eq(to_char_type(c),gptr()[-1]), quindi semplicemente gptr() decrementa di uno.

Original:

If c is not the EOF character, as determined by calling Traits::eq_int_type(c,traits::eof()) and if there is room for a putback, and if c is exactly the character that was most recently read from the get area, as determined by Traits::eq(to_char_type(c),gptr()[-1]), then simply decrements gptr() by one.

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2)

Se c non è il carattere EOF, come determinata dalla chiamata Traits::eq_int_type(c,traits::eof()) e se c'è spazio per un putback, e se il buffer è permesso di modificare le ottenere zona, diminuisce gptr() e c scrive a lì. Si noti che questo non modifica la sequenza di caratteri associata (il file), ma solo la zona di ottenere in memoria.

Original:

If c is not the EOF character, as determined by calling Traits::eq_int_type(c,traits::eof()) and if there is room for a putback, and if the buffer is allowed to modify the get area, decrements gptr() and writes c to there. Note that this does not modify the associated character sequence (the file), but only the get area in memory.

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3)

Se c è il carattere EOF (Traits::eq_int_type(c,traits::eof()) ritorna true), e se c'è spazio per un putback, decrementa gptr(). Questo ha l'effetto di rendere il carattere letto disponibili per la lettura di nuovo.

Original:

If c is the EOF character (Traits::eq_int_type(c,traits::eof()) returns true), and if there is room for a putback, decrements gptr(). This has the effect of making the last character read available for reading once again.

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Se il file non è aperto (is_open()==false, questa funzione restituisce Traits::eof() immediatamente.

Original:

If the file is not open (is_open()==false, this function returns Traits::eof() immediately.

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Parametri

c

-

il carattere di putback, o eof Original: the character to putback, or eof The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

1-2) c

3) Traits::not_eof(c)

Traits::eof() in caso di guasto.

Original:

Traits::eof() in case of failure.

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Vedi anche

pbackfail [virtuale]	mette un carattere indietro nella sequenza di ingresso, eventualmente modificando la sequenza di ingresso Original: puts a character back into the input sequence, possibly modifying the input sequence The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (virtuale protetto funzione of std::basic_streambuf membro)
sungetc	sposta il puntatore successivo nella sequenza di input retro di uno Original: moves the next pointer in the input sequence back by one The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
sputbackc	mette un carattere indietro nella sequenza di input Original: puts one character back in the input sequence The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
unget	unextracts un carattere Original: unextracts a character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
putback	mette carattere nel flusso di input Original: puts character into input stream The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)