std::ios_base::iostate

 

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D'entrée / sortie de bibliothèque

I / O manipulateurs

C-style I / O

Tampons 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 (obsolète)

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Abstractions 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

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basic_ifstream

basic_ofstream

basic_fstream

Chaîne 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

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istrstream (obsolète)

ostrstream (obsolète)

strstream (obsolète)

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streamoff

streamsize

fpos

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iostream_category (C++11)

io_errc (C++11)

 

std::ios_base

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ios_base::ios_base

ios_base::~ios_base

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ios_base::flags

ios_base::setf

ios_base::unsetf

ios_base::precision

ios_base::width

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ios_base::imbue

ios_base::getloc

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ios_base::xalloc

ios_base::iword

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ios_base::register_callback

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ios_base::failure

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ios_base::openmode

ios_base::fmtflags

ios_base::iostate

ios_base::seekdir

ios_base::event

ios_base::event_callback

 

typedef /*implementation defined*/ iostate;
static constexpr iostate goodbit = 0;
static constexpr iostate badbit = /*implementation defined*/ static constexpr iostate failbit = /*implementation defined*/ static constexpr iostate eofbit = /*implementation defined*/

Spécifie les indicateurs d'état des cours d'eau. C'est un BitmaskType, les constantes suivantes sont définies :

Original:

Specifies stream state flags. It is a BitmaskType, the following constants are defined:

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Constante Original: Constant The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Explanation
goodbit	pas d'erreur Original: no error The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
badbit	erreur de flux irrécupérables Original: irrecoverable stream error The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
failbit	d'entrée / sortie de l'opération a échoué (erreur de formatage ou d'extraction) Original: input/output operation failed (formatting or extraction error) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
eofbit	séquence d'entrée associé a atteint la fin de fichier Original: associated input sequence has reached end-of-file The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

L'eofbit

Le eofbit est défini par les fonctions suivantes de la bibliothèque standard:.

Original:

The eofbit is set by the following standard library functions:

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• La fonction std::getline chaîne d'entrée si elle se termine en atteignant la fin du flux, plutôt que d'atteindre le caractère spécifié fin .

  Original:

  The string input function std::getline if it completes by reaching the end of the stream, as opposed to reaching the specified terminating character.

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• Les surcharges d'entrée numériques de basic_istream::operator>> si la fin du flux a été rencontrée lors de la lecture du caractère suivant, à l'étape 2 du traitement num_get::get. Selon l'état de l'analyse, failbit peut ou ne peut pas être réglé en même temps: par exemple, int n; istringstream buf("1"); buf >> n; ensembles eofbit, mais pas failbit: le 1 entier a pu être analysé et stocké dans n. D'autre part, bool b; istringstream buf("tr"); buf >> boolalpha >> b; définit à la fois eofbit et failbit: il n'y avait pas assez de caractères pour compléter l'analyse du true booléen .

  Original:

  The numeric input overloads of basic_istream::operator>> if the end of the stream was encountered while reading the next character, on Stage 2 of num_get::get processing. Depending on the parsing state, failbit may or may not be set at the same time: for example, int n; istringstream buf("1"); buf >> n; sets eofbit, but not failbit: the integer 1 was successfully parsed and stored in n. On the other hand, bool b; istringstream buf("tr"); buf >> boolalpha >> b; sets both eofbit and failbit: there was not enough characters to complete the parsing of the boolean true.

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• Les surcharges d'extraction de caractères de operator>>std::basic_istream, si la fin du flux est atteinte avant que la limite (le cas échéant) sur le nombre de caractères à extraire .

  Original:

  The character extraction overloads of operator>>std::basic_istream, if the end of the stream is reached before the limit (if any) on the number of characters to be extracted.

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• Le std::get_time I / O manipulateur et l'une des fonctions d'analyse de std::time_get: time_get::get, time_get::get_time, time_get::get_date, etc, si la fin du flux est atteinte avant le dernier caractère nécessaire pour analyser le attendue valeur date / heure a été traité .

  Original:

  The std::get_time I/O manipulator and any of the std::time_get parsing functions: time_get::get, time_get::get_time, time_get::get_date, etc., if the end of the stream is reached before the last character needed to parse the expected date/time value was processed.

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• La std::get_money E / S et la fonction de manipulateur money_get::get, si la fin du flux est atteinte avant que le dernier caractère nécessaire d'analyser la valeur monétaire attendue a été générée .

  Original:

  The std::get_money I/O manipulator and money_get::get function, if the end of the stream is reached before the last character needed to parse the expected monetary value was processed.

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• Le constructeur basic_istream::sentry, exécuté au début de chaque fonction de saisie formatée: si le bit est à l'arrêt skipws (par exemple par l'émission std::noskipws), sentinelle lit et supprime les principaux personnages blancs. Si la fin du flux d'entrée est atteinte lors de cette opération, à la fois eofbit et failbit sont fixés, et aucune entrée a lieu .

  Original:

  The basic_istream::sentry constructor, executed at the beginning of every formatted input function: unless the skipws bit is unset (e.g. by issuing std::noskipws), sentry reads and discards the leading whitespace characters. If the end of the input stream is reached during this operation, both eofbit and failbit are set, and no input takes place.

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• Le std::ws manipulateur d'E / S, si elle atteint la fin du flux tout en consommant des espaces (mais, contrairement à la sentinelle de saisie formatée, elle ne définit pas failbit dans ce cas)

  Original:

  The I/O manipulator std::ws, if it reaches the end of the stream while consuming whitespace (but, unlike the formatted input sentry, it does not set failbit in this case)

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• Les fonctions d'entrée non mis en forme basic_istream::read, basic_istream::get, et basic_istream::getline, lorsqu'il atteint la fin du flux .

  Original:

  The unformatted input functions basic_istream::read, basic_istream::get, and basic_istream::getline, when reaching the end of the stream.

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• basic_istream::ignore la fonction de mise hors d'entrée, lorsqu'il atteint la fin du flux de caractères avant d'atteindre le séparateur spécifié .

  Original:

  The discard input function basic_istream::ignore, when reaching the end of the stream before reaching the specified delimiter character.

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• Le basic_istream::readsome entrée immédiate fonction, si basic_streambuf::in_avail retourne -1

  Original:

  The immediate input function basic_istream::readsome, if basic_streambuf::in_avail returns -1

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Les fonctions suivantes effacer eofbit comme un effet secondaire:

Original:

The following functions clear eofbit as a side-effect:

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• basic_istream::putback
• basic_istream::unget
• basic_istream::seekg

L'failbit

Le failbit est défini par les fonctions suivantes de la bibliothèque standard:

Original:

The failbit is set by the following standard library functions:

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L'BadBit

Le BadBit est défini par les fonctions suivantes de la bibliothèque standard:

Original:

The badbit is set by the following standard library functions:

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Voir aussi

ios_base::iostate flags			basic_ios accessors
eofbit	failbit	badbit	good()	fail()	bad()	eof()	operator bool()	operator!()
false	false	false	true	false	false	false	true	false
false	false	true	false	true	true	false	false	true
false	true	false	false	true	false	false	false	true
false	true	true	false	true	true	false	false	true
true	false	false	false	false	false	true	true	false
true	false	true	false	true	true	true	false	true
true	true	false	false	true	false	true	false	true
true	true	true	false	true	true	true	false	true