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std::iostream_category

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< cpp‎ | io

 
 
Entrada / salida de la biblioteca
I / O manipuladores
C-estilo I / O
Buffers
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleto)
Arroyos
Original:
Streams
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Abstracciones
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Cadena de I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Matriz I / O
Original:
Array I/O
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istrstream(obsoleto)
ostrstream(obsoleto)
strstream(obsoleto)
Tipos
Original:
Types
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streamoff
streamsize
fpos
Error interfaz categoría
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
Defined in header <ios>
const std::error_category& iostream_category();
(desde C++11)
Obtiene una referencia al objeto de error para los errores de categoría estática iostream. El objeto es necesaria para anular el error_category::name() función virtual para devolver un puntero a la cadena "iostream". Se utiliza para identificar los códigos de error previstos en las excepciones del tipo std::ios_base::failure .
Original:
Obtains a reference to the static error category object for iostream errors. The object is required to override the virtual function error_category::name() to return a pointer to the string "iostream". It is used to identify error codes provided in the exceptions of type std::ios_base::failure.
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Contenido

[editar] Parámetros

(Ninguno)
Original:
(none)
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[editar] Valor de retorno

Una referencia al objeto estático de tipo no especificado de tiempo de ejecución, derivado de std::error_category .
Original:
A reference to the static object of unspecified runtime type, derived from std::error_category.
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[editar] Excepciones

noexcept specification:  
noexcept
  (desde C++11)

[editar] Ejemplo

#include <iostream>
#include <fstream>
 
int main()
{
    std::ifstream f("doesn't exist");
    try {
        f.exceptions(f.failbit);
    } catch (const std::ios_base::failure& e) {
        std::cout << "Caught an ios_base::failure.\n"
                  << "Error category: " << e.code().category().name() << '\n';
    }
}

Output:

Caught an ios_base::failure.
Error category: iostream

[editar] Ver también

corriente excepción
Original:
stream exception
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(miembro público of std::ios_base clase) [edit]
(C++11)
los códigos IO secuencia de error
Original:
the IO stream error codes
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(enum) [edit]