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std::future_error

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Threads
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thread(C++11)
this_thread namespace
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this_thread namespace
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Mutual exclusion
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mutex(C++11)
timed_mutex(C++11)
Gestão de bloqueio genérico
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Generic lock management
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lock_guard(C++11)
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Futures
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promise(C++11)
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std::future_error
Funções de membro
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Member functions
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future_error::future_error
future_error::code
future_error::what
 
Defined in header <future>
class future_error;
(a partir do C++ 11)
O std::future_error classe define um objeto de exceção que é acionada em caso de falha das funções na biblioteca thread que lidam com a execução assíncrona e estados compartilhada (std::future, std::promise, etc). Similar ao std::system_error, esta excepção carrega um código de erro compatível com std::error_code.
Original:
The class std::future_error defines an exception object that is thrown on failure by the functions in the thread library that deal with asynchronous execution and shared states (std::future, std::promise, etc). Similar to std::system_error, this exception carries an error code compatible with std::error_code.
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cpp/error/exceptioncpp/error/logic errorstd-future error-inheritance.svg
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Inheritance diagram

Índice

[editar] Funções de membro

cria um objeto std::future_error
Original:
creates a std::future_error object
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(função pública membro) [edit]
retorna o código de erro
Original:
returns the error code
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(função pública membro) [edit]
retorna a seqüência explicativa específica para o código de erro
Original:
returns the explanatory string specific to the error code
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(função pública membro) [edit]

Inherited from std::logic_error

Inherited from std::exception

Member functions

[virtual]
destrói o objeto de exceção
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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 <future>
#include <iostream>
 
int main()
{
    std::future<int> empty;
    try {
        int n = empty.get();
    } catch (const std::future_error& e) {
        std::cout << "Caught a future_error with code \"" << e.code()
                  << "\"\nMessage: \"" << e.what() << "\"\n";
    }
}

Output:

Caught a future_error with code "future:3"
Message: "No associated state"

[editar] Veja também

identifica os códigos de erro do futuro
Original:
identifies the future error codes
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(enum) [edit]