std::basic_filebuf::pbackfail

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

Versetzt den Charakter c zurück in die get-Bereich, in einer der drei Möglichkeiten:

Original:

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

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1)

Wenn c nicht die EOF-Zeichen, wie durch den Aufruf Traits::eq_int_type(c,traits::eof()) und wenn es Raum für eine putback bestimmt, und wenn c genau ist das Zeichen, dass wurde zuletzt von der get-Bereich, wie Traits::eq(to_char_type(c),gptr()[-1]) bestimmt, dann einfach dekrementiert gptr() einzeln gelesen .

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)

Wenn c nicht das EOF-Zeichen, wie durch Aufrufen Traits::eq_int_type(c,traits::eof()) und wenn es Raum für eine putback bestimmt, und wenn der Puffer erlaubt, die Fläche zu erhalten, dekrementiert gptr() modifizieren und schreibt c nach dort. Beachten Sie, dass dies nicht zu ändern die zugehörige Zeichenfolge (die Datei), sondern nur die sich im Arbeitsspeicher .

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)

Wenn c ist die EOF-Zeichen (Traits::eq_int_type(c,traits::eof()) kehrt true), und wenn es Raum für eine putback, dekrementiert gptr(). Dies hat den Effekt, dass das letzte Zeichen ausgelesen zum Lesen wieder .

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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Wenn die Datei nicht geöffnet ist (is_open()==false diese Funktion kehrt Traits::eof() sofort .

Original:

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

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Parameter

c

-

das Zeichen putback oder 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.

Rückgabewert

1-2) c

3) Traits::not_eof(c)

Traits::eof() im Falle des Scheiterns .

Original:

Traits::eof() in case of failure.

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Siehe auch

pbackfail [virtuell]	stellt ein Zeichen wieder in der Eingangssequenz, gegebenenfalls Modifizierung der Eingabesequenz 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. (virtuellen geschützten Member-Funktion of std::basic_streambuf)
sungetc	bewegt den nächsten Zeiger in der Eingabesequenz zurück um eins 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. (öffentliche Elementfunktion of std::basic_streambuf)
sputbackc	stellt ein Zeichen wieder in der Eingabesequenz 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. (öffentliche Elementfunktion of std::basic_streambuf)
unget	unextracts ein Zeichen 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. (öffentliche Elementfunktion of std::basic_istream)
putback	setzt Zeichen in Input-Stream 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. (öffentliche Elementfunktion of std::basic_istream)