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std::exception_ptr

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< cpp‎ | error

 
 
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initializer_list(C++11)
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
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Pares y tuplas
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Pairs and tuples
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pair
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piecewise_construct_t(C++11)
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Cambiar, hacia adelante y mover
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Swap, forward and move
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swap
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Gestión de errores
Manejo de excepciones
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Exception handling
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exception
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make_exception_ptr(C++11)
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Categorías excepción
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Exception categories
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logic_error
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out_of_range
runtime_error
range_error
overflow_error
underflow_error
Los códigos de error
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Error codes
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Los códigos de error
errno
Las afirmaciones
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Assertions
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assert
instalación SYSTEM_ERROR
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system_error facility
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error_category(C++11)
generic_category(C++11)
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errc(C++11)
error_code(C++11)
system_error(C++11)
 
Defined in header <exception>
typedef /*unspecified*/ exception_ptr;
(desde C++11)
std::exception_ptr es anulable un puntero de tipo de tipo que maneja un objeto de excepción que ha sido lanzado y capturado con std::current_exception. Una instancia de std::exception_ptr se puede hacer pasar a otra función, posiblemente en otro hilo, donde la excepción puede ser relanzada y manipulados con una cláusula catch .
Original:
std::exception_ptr is a nullable pointer-like type that manages an exception object which has been thrown and captured with std::current_exception. An instance of std::exception_ptr may be passed to another function, possibly on another thread, where the exception may be rethrown and handled with a catch clause.
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Default-construido std::exception_ptr es un puntero nulo, no apunta a un objeto de excepción .
Original:
Default-constructed std::exception_ptr is a null pointer, it does not point to an exception object.
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Dos instancias de std::exception_ptr son iguales sólo si ambas son nulas o punto tanto en el objeto de excepción mismo .
Original:
Two instances of std::exception_ptr compare equal only if they are both null or both point at the same exception object.
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std::exception_ptr no es implícitamente convertible a cualquier aritmética, enumeración o tipo puntero. Es convertible a bool .
Original:
std::exception_ptr is not implicitly convertible to any arithmetic, enumeration, or pointer type. It is convertible to bool.
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El objeto de excepción que hace referencia una std::exception_ptr sigue siendo válida siempre y cuando no se mantiene al menos un std::exception_ptr que lo está haciendo referencia: std::exception_ptr es un puntero compartido propiedad inteligente .
Original:
The exception object referenced by an std::exception_ptr remains valid as long as there remains at least one std::exception_ptr that is referencing it: std::exception_ptr is a shared-ownership smart pointer.
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[editar] Ejemplo

[edit]
#include <iostream>
#include <string>
#include <exception>
#include <stdexcept>
 
void handle_eptr(std::exception_ptr eptr) // passing by value is ok
{
    try {
        if (eptr != std::exception_ptr()) {
            std::rethrow_exception(eptr);
        }
    } catch(const std::exception& e) {
        std::cout << "Caught exception \"" << e.what() << "\"\n";
    }
}
 
int main()
{
    std::exception_ptr eptr;
    try {
        std::string().at(1); // this generates an std::out_of_range
    } catch(...) {
        eptr = std::current_exception(); // capture
    }
    handle_eptr(eptr);
} // destructor for std::out_of_range called here, when the eptr is destructed

Output:

Caught exception "basic_string::at"

[editar] Ver también

crea una std::exception_ptr de un objeto de excepción
Original:
creates an std::exception_ptr from an exception object
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(función de plantilla) [edit]
captures the current exception in a std::exception_ptr
(función) [edit]
produce la excepción de un std::exception_ptr
Original:
throws the exception from an std::exception_ptr
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(función) [edit]