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std::system_error

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Os operadores relacionais
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
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Swap, forward and move
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De tratamento de erros
Manipulação de exceção
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Códigos de erro
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instalação system_error
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system_error facility
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system_error
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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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cpp/error/exceptioncpp/error/runtime errorstd-system error-inheritance.svg
Sobre esta imagem

Inheritance diagram

Índice

[editar] Funções de membro
constrói o objeto system_error
Original:
constructs the system_error object
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(função pública membro) [edit]
retorna código de erro
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returns error code
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(função pública membro) [edit]
[virtual]
Retorna a string explicativo
Original:
returns explanatory string
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(função pública virtual membro) [edit]

Herdado de std::exception

Member functions

[virtual]
destrói o objeto de exceção
Original:
destructs the exception object
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(of std::exception função pública virtual membro) [edit]
[virtual]
retorna uma cadeia explicativa
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returns an explanatory string
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(of std::exception função pública virtual membro) [edit]

[editar] 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
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