std::ios_base::iostate

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[editar] O eofbit

• A seqüência de std::getline função de entrada se completa ao atingir o final do fluxo, em vez de alcançar o caractere especificado terminando.

  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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• As sobrecargas de entrada numéricos de basic_istream::operator>> se o fim do fluxo foi encontrado ao ler o caractere seguinte, em 2 ª fase de processamento num_get::get. Dependendo do estado a análise, failbit pode ou não pode ser definida ao mesmo tempo: por exemplo, os conjuntos int n; istringstream buf("1"); buf >> n; eofbit, mas não failbit: a 1 inteiro foi analisado com êxito e armazenadas em n. Por outro lado, bool b; istringstream buf("tr"); buf >> boolalpha >> b; define tanto eofbit e failbit: não havia caracteres suficientes para completar a análise do true boolean.

  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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• As sobrecargas de caracteres de extracção de operator>>std::basic_istream, se o fim do fluxo for atingido antes do limite (se for o caso) sobre o número de caracteres a serem extraídos.

  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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• O std::get_time manipulador I / O e qualquer uma das funções de análise std::time_get: time_get::get, time_get::get_time, time_get::get_date, etc, se o fim do fluxo for alcançado antes do último caractere necessário para analisar o valor de data / hora prevista foi processado.

  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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• O std::get_money manipulador I / O e função money_get::get, se o fim do fluxo for alcançado antes do último caractere necessário para analisar o valor monetário esperado foi processado.

  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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• O construtor basic_istream::sentry, executado no início de cada função de entrada formatada: a menos que o bit é skipws unset (por exemplo, através da emissão de std::noskipws), sentinela lê e descarta os personagens principais espaços em branco. Se o fim do fluxo de entrada é atingido durante esta operação, tanto eofbit failbit e são definidas, e nenhuma entrada tem lugar.

  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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• O manipulador std::ws I / O, se atinge o final do fluxo, enquanto consome espaço em branco (mas, ao contrário da sentinela entrada formatada, ele não define failbit, neste caso)

  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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• As funções de entrada não formatados basic_istream::read, basic_istream::get, e basic_istream::getline, quando chegar ao fim do fluxo.

  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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• O descarte basic_istream::ignore função de entrada, quando chegar ao fim do fluxo antes de atingir o caractere delimitador especificado.

  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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• O basic_istream::readsome função imediata entrada, se basic_streambuf::in_avail retorna -1

  Original:

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

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

[editar] O failbit

[editar] O badbit

[editar] Exemplo

[editar] Veja também