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std::future_error

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Tema Biblioteca de ayuda
Threads
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Threads
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(C++11)
this_thread espacio de nombres
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this_thread namespace
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(C++11)
(C++11)
(C++11)
Exclusión mutua
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Mutual exclusion
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(C++11)
Gestión de bloqueos genérico
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Generic lock management
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(C++11)
(C++11)
(C++11)
(C++11)(C++11)(C++11)
Las variables de condición
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Condition variables
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(C++11)
Futuros
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Futures
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(C++11)
(C++11)
(C++11)
(C++11)
future_error
(C++11)
 
std::future_error
Las funciones miembro
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Member functions
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Definido en la cabecera <future>
class future_error;
(desde C++11)
El std::future_error clase define un objeto de excepción que se produce en caso de fallo de las funciones de la biblioteca de subprocesos que tienen que ver con la ejecución asincrónica y estados compartida (std::future, std::promise, etc). Al igual que std::system_error, esta excepción lleva un código de error compatible con 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

Contenido

[editar] Las funciones miembro

crea un objeto std::future_error
Original:
creates a std::future_error object
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(función miembro público) [editar]
devuelve el código de error
Original:
returns the error code
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(función miembro público) [editar]
devuelve la cadena de motivos específicos para el código de error
Original:
returns the explanatory string specific to the error code
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(función miembro público) [editar]

Inherited from std::logic_error

Inherited from std::exception

Member functions

[virtual]
destructs el objeto de excepción
Original:
destructs the exception object
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(función miembro público virtual de std::exception) [editar]
[virtual]
devuelve una cadena explicativa
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returns an explanatory string
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(función miembro público virtual de std::exception) [editar]

[editar] Ejemplo

#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";
    }
}

Salida:

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

[editar] Ver también

identifica los códigos de error en el futuro
Original:
identifies the future error codes
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(enum) [editar]