std::system_category
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<tbody> </tbody>| Dclar dans l'en-tte <system_error>
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const std::error_category& system_category(); |
(depuis C++11) | |
Obtient une rfrence l'objet de classe d'erreur statique pour des erreurs signales par le systme d'exploitation. L'objet est ncessaire pour annuler la
error_category::name() fonction virtuelle de retourner un pointeur sur la chane de "system". Il est galement ncessaire de remplacer la fonction virtuelle error_category::default_error_condition() pour mapper les codes d'erreur POSIX ce match errno valeurs std::generic_category .Original:
Obtains a reference to the static error category object for errors reported by the operating system. The object is required to override the virtual function
error_category::name() to return a pointer to the string "system". It is also required to override the virtual function error_category::default_error_condition() to map the error codes that match POSIX errno values to std::generic_category.The text has been machine-translated via Google Translate.
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Paramtres
(Aucun)
Original:
(none)
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Retourne la valeur
Une rfrence l'objet statique de type l'excution indtermine, driv de std::error_category .
Original:
A reference to the static object of unspecified runtime type, derived from std::error_category.
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Exceptions
Exemple
#include <iostream>
#include <system_error>
#include <iomanip>
#include <string>
int main()
{
std::error_condition econd = std::system_category().default_error_condition(EDOM);
std::cout << "Category: " << econd.category().name() << '\n'
<< "Value: " << econd.value() << '\n'
<< "Message: " << econd.message() << '\n';
econd = std::system_category().default_error_condition(10001);
std::cout << "Category: " << econd.category().name() << '\n'
<< "Value: " << econd.value() << '\n'
<< "Message: " << econd.message() << '\n';
}
Rsultat :
Category: generic
Value: 33
Message: Numerical argument out of domain
Category: system
Value: 10001
Message: Unknown error 10001
Voir aussi
(C++11) |
identifie la catgorie d'erreur gnrique Original: identifies the generic error category The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) |
(C++11) |
l'numration std::error_condition liste de tous les standards <cerrno> constantes macroOriginal: the std::error_condition enumeration listing all standard <cerrno> macro constantsThe text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe) |