Namespace
Varianti

std::iostream_category

Da cppreference.com.
< cpp‎ | io

 
 
Ingresso / libreria di output
I / O manipolatori
C-style I / O
Buffer
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(deprecato)
Streams
Original:
Streams
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Astrazioni
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
String I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
Original:
Array I/O
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istrstream(deprecato)
ostrstream(deprecato)
strstream(deprecato)
Tipi
Original:
Types
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streamoff
streamsize
fpos
Errore categoria interfaccia
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();
(dal C++11)
Ottiene un riferimento all'oggetto statico categoria degli errori di iostream. L'oggetto è necessario eseguire l'override della funzione virtuale error_category::name() per restituire un puntatore alla stringa "iostream". Viene utilizzato per identificare i codici di errore previsti nelle eccezioni di cui std::ios_base::failure tipo.
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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Indice

[modifica] Parametri

(Nessuno)
Original:
(none)
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[modifica] Valore di ritorno

Un riferimento all'oggetto statico del tipo di runtime non specificato, derivato da std::error_category.
Original:
A reference to the static object of unspecified runtime type, derived from std::error_category.
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[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Esempio

#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

[modifica] Vedi anche

flusso di eccezione
Original:
stream exception
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(membro pubblico of std::ios_base classe) [edit]
(C++11)
il flusso IO codici di errore
Original:
the IO stream error codes
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(enum) [edit]