Conceptos C++: UnformattedInputFunction - cppreference.com

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Requisitos

Un UnformattedInputFunction es una función de entrada de corriente que realiza lo siguiente:

Original:

An UnformattedInputFunction is a stream input function that performs the following:

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Construye un objeto de tipo
basic_istream::sentry
con duración de almacenamiento automático y con el argumento noskipws establece en true, que realiza lo siguiente
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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si
eofbit
o
badbit
se establecen en el flujo de entrada, establece el failbit también, y si las excepciones a failbit están habilitadas en la máscara de excepción esta corriente de entrada, arroja
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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vacía el empate () 'd stream de salida, si procede
Original:
flushes the tie()'d output stream, if applicable
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Comprueba el estado de la centinela llamando sentry::operator bool(), que es 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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Si el centinela volvió false o constructor centinela lanzó una excepción:
Original:
If the sentry returned false or sentry's constructor threw an exception:
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establece el número de caracteres extraídos (gcount) en el flujo de entrada a cero
Original:
sets the number of extracted characters (gcount) in the input stream to zero
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si la función se llama a escribir en una matriz de CharT, escribe CharT() (el carácter nulo) a la primera localización de la matriz
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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Si el centinela volvió true, realiza la entrada
Original:
If the sentry returned true, performs the input
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si se produce una excepción durante la entrada, establece badbit en el flujo de entrada. Si las excepciones en badbit están habilitadas en la máscara de excepción de esta corriente, la excepción se vuelve a iniciar también .
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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Si no es la excepción fue lanzada durante la entrada, establece el número de caracteres extraídos (gcount) en la corriente de entrada .
Original:
If no exception was thrown during input, sets the number of extracted characters (gcount) in the input stream.
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En cualquier caso, si termina por excepción o devolver, destructor del centinela se llama antes de salir de esta función .
Original:
In any event, whether terminating by exception or returning, the sentry's destructor is called before leaving this function.
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Biblioteca estándar

Las siguientes funciones de la biblioteca estándar son UnformattedInputFunctions .

Original:

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std::getline, excepto que no 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
, excepto que primero despeja eofbit
Original:
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basic_istream::unget
, excepto que primero despeja eofbit
Original:
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basic_istream::sync
, excepto que no modifica gcount
Original:
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basic_istream::tellg
, excepto que no modifica gcount
Original:
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basic_istream::seekg
, excepto que primero despeja eofbit y no modifica gcount
Original:
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std::ws, excepto que no modifica gcount
Original:
std::ws, except that it does not modify gcount
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