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std::system_error::system_error

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< cpp‎ | error‎ | system error

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C++
 
Utilità libreria
Tipo di supporto (basic types, RTTI, type traits)
Gestione della memoria dinamica
La gestione degli errori
Programma di utilità
Funzioni variadic
Data e ora
Funzione oggetti
initializer_list(C++11)
bitset
hash(C++11)
Gli operatori relazionali
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Coppie e tuple
Original:
Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Swap, in avanti e spostare
Original:
Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
La gestione degli errori
Gestione delle eccezioni
Original:
Exception handling
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exception
uncaught_exception
exception_ptr(C++11)
make_exception_ptr(C++11)
current_exception(C++11)
rethrow_exception(C++11)
nested_exception(C++11)
throw_with_nested(C++11)
rethrow_if_nested(C++11)
Gestione delle eccezioni fallimenti
Original:
Exception handling failures
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terminate
terminate_handler
get_terminate(C++11)
set_terminate
unexpected(deprecato)
bad_exception
unexpected_handler(deprecato)
get_unexpected(C++11)(deprecato)
set_unexpected(deprecato)
Eccezione categorie
Original:
Exception categories
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logic_error
invalid_argument
domain_error
length_error
out_of_range
runtime_error
range_error
overflow_error
underflow_error
Codici di errore
Original:
Error codes
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Codici di errore
errno
Asserzioni
Original:
Assertions
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assert
impianto system_error
Original:
system_error facility
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error_category(C++11)
generic_category(C++11)
system_category(C++11)
error_condition(C++11)
errc(C++11)
error_code(C++11)
system_error(C++11)
 
std::system_error
Membri funzioni
Original:
Member functions
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system_error::system_error
system_error::code
system_error::what
 
system_error( std::error_code ec );
 (1) (dal C++11)
system_error( std::error_code ec, const std::string& what_arg );
 (2) (dal C++11)
system_error( std::error_code ec, const char* what_arg );
 (2) (dal C++11)
system_error( int ev, const std::error_category& ecat
 (3) (dal C++11)
system_error( int ev, const std::error_category& ecat,
              const std::string& what_arg);
 (4) (dal C++11)
system_error( int ev, const std::error_category& ecat,
              const char* what_arg);
 (4) (dal C++11)
Costruisce nuovo oggetto errore di sistema.
Original:
Constructs new system error object.
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1)
Costrutti con ec codice di errore
Original:
Constructs with error code ec
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2)
Costrutti con ec codice di errore e la stringa what_arg spiegazione. La stringa restituita da what() è garantito per contenere what_arg.
Original:
Constructs with error code ec and explanation string what_arg. The string returned by what() is guaranteed to contain what_arg.
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3)
Costrutti con ev sottostante il codice di errore e la categoria di errore associato ecat.
Original:
Constructs with underlying error code ev and associated error category ecat.
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4)
Costrutti con ev sottostante il codice di errore, associato ecat categoria di errore e what_arg stringa esplicativa. La stringa restituita da what() è garantito per contenere what_arg.
Original:
Constructs with underlying error code ev, associated error category ecat and explanatory string what_arg. The string returned by what() is guaranteed to contain what_arg.
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[modifica] Parametri

ec -
codice di errore
Original:
error code
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ev -
codice di errore nella codifica di base
Original:
error code in base encoding
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ecat -
la categoria di errore
Original:
the category of error
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what_arg -
stringa esplicativa
Original:
explanatory string
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[modifica] Esempio

Viene illustrato come creare un'eccezione system_error da un valore errno
Original:
Demonstrates how to create a system_error exception from a errno value
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#include <iostream>
#include <system_error>
 
int main()
{
    try
    {
        throw std::system_error(EDOM, std::system_category());
    }
    catch (const std::system_error& error)
    {
        std::cout << "Error: " << error.code()
                  << " - " << error.code().message() << '\n';
    }
}

Output: 

Error: system:33 - Numerical argument out of domain
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/error/system_error/system_error&oldid=25595"