std::system_error - cppreference.com

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Definido no cabeçalho `<system_error>`

`class system_error;`		(desde C++11)

std::system_error é o tipo da exceção lançada por várias funções de biblioteca (normalmente as funções que fazem interface com as instalações do sistema operacional, por exemplo, o construtor de std::thread), quando a exceção tem um std::error_code associado, que terá de ser comunicado.

Original:

std::system_error is the type of the exception thrown by various library functions (typically the functions that interface with the OS facilities, e.g. the constructor of std::thread), when the exception has an associated std::error_code which needs to be reported.

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Inheritance diagram

Funções de membro


(constructor)	constrói o objeto `system_error` Original: constructs the `system_error` object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) [edit]

code	retorna código de erro Original: returns error code The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) [edit]

what [virtual]	Retorna a string explicativo Original: returns explanatory string The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública virtual membro) [edit]

Herdado de std::exception

Member functions


	destrói o objeto de exceção Original: destructs the exception object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (of `std::exception` função pública virtual membro) [edit]

	retorna uma cadeia explicativa Original: returns an explanatory string The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (of `std::exception` função pública virtual membro) [edit]

Exemplo

#include <thread>
#include <iostream>
#include <system_error>

int main()
{
    try {
        std::thread().detach(); // attempt to detach a non-thread
    } catch(const std::system_error& e) {
        std::cout << "Caught system_error with code " << e.code() 
                  << " meaning " << e.what() << '\n';
    }
}

Saída:

Caught system_error with code generic:22 meaning Invalid argument