std::future_error - cppreference.com

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Definido no cabeçalho `<future>`

`class future_error;`		(desde 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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Inheritance diagram

Funções de membro


(constructor)	cria um objeto `std::future_error` Original: creates a `std::future_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 o código de erro Original: returns the 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	retorna a seqüência explicativa específica para o código de erro Original: returns the explanatory string specific to the 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]

Herdado de std::logic_error

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 <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";
    }
}

Saída:

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

Veja também


	identifica os códigos de erro do futuro Original: identifies the future error codes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (enum) [edit]