<div class="t-tr-text">C + +: concetti<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">C++ concepts:</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div> UnformattedInputFunction

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[modifica] Requisiti

• Crea un oggetto di tipo basic_istream::sentry con durata memorizzazione automatica e con l'argomento noskipws impostato true, che esegue il seguente

  Original:

  Constructs an object of type basic_istream::sentry with automatic storage duration and with the noskipws argument set to true, which performs the following

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• se eofbit o badbit sono impostati sul flusso di input, imposta il failbit pure, e se eccezioni failbit sono abilitati in maschera di eccezione questo flusso di input, getta ios_base::failure.

  Original:

  if eofbit or badbit are set on the input stream, sets the failbit as well, and if exceptions on failbit are enabled in this input stream's exception mask, throws ios_base::failure.

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• svuota il legame () "flusso di uscita d, se applicabile

  Original:

  flushes the tie()'d output stream, if applicable

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• Verifica lo stato della sentinella chiamando sentry::operator bool(), che è equivalente a basic_ios::good.

  Original:

  Checks the status of the sentry by calling sentry::operator bool(), which is equivalent to basic_ios::good.

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• Se la sentinella restituito false o il costruttore sentinella ha generato un'eccezione:

  Original:

  If the sentry returned false or sentry's constructor threw an exception:

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• imposta il numero di caratteri estratti (gcount) nel flusso di ingresso a zero

  Original:

  sets the number of extracted characters (gcount) in the input stream to zero

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• se la funzione è stata chiamata a scrivere una serie di CharT, scrive CharT() (il carattere null) alla prima posizione della matrice

  Original:

  if the function was called to write to an array of CharT, writes CharT() (the null character) to the first location of the array

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• Se la sentinella restituito true, esegue l'ingresso

  Original:

  If the sentry returned true, performs the input

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• se viene generata un'eccezione durante l'ingresso, imposta badbit nel flusso di input. Se eccezioni badbit sono attivati ​​in questa maschera di eccezione ruscello, l'eccezione viene rilanciata anche.

  Original:

  if an exception is thrown during input, sets badbit in the input stream. If exceptions on badbit are enabled in this stream's exception mask, the exception is also rethrown.

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• Se nessuna eccezione è stata generata durante l'immissione, impostare il numero di caratteri estratti (gcount) nel flusso di input.

  Original:

  If no exception was thrown during input, sets the number of extracted characters (gcount) in the input stream.

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• In ogni caso, sia che chiude per eccezione o di ritorno, distruttore della sentinella è chiamato prima di lasciare questa funzione.

  Original:

  In any event, whether terminating by exception or returning, the sentry's destructor is called before leaving this function.

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[modifica] Libreria standard

• std::getline, con la differenza che non modifica gcount.

  Original:

  std::getline, except that it does not modify gcount.

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• basic_istream::operator>>(basic_streambuf*)
• basic_istream::get
• basic_istream::getline
• basic_istream::ignore
• basic_istream::peek
• basic_istream::read
• basic_istream::readsome
• basic_istream::putback, salvo che si cancella prima eofbit

  Original:

  basic_istream::putback, except that it first clears eofbit

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• basic_istream::unget, salvo che si cancella prima eofbit

  Original:

  basic_istream::unget, except that it first clears eofbit

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• basic_istream::sync, con la differenza che non modifica gcount

  Original:

  basic_istream::sync, except that it does not modify gcount

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• basic_istream::tellg, con la differenza che non modifica gcount

  Original:

  basic_istream::tellg, except that it does not modify gcount

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• basic_istream::seekg, salvo che si cancella prima eofbit e non modifica gcount

  Original:

  basic_istream::seekg, except that it first clears eofbit and does not modify gcount

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• std::ws, con la differenza che non modifica gcount

  Original:

  std::ws, except that it does not modify gcount

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