std::uncaught_exception
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| Defined in header <exception>
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| bool uncaught_exception(); |
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Detecta si el subproceso actual tiene un objeto de excepción en vivo, es decir, ha sido una excepción y no ha entrado una cláusula catch coincidente, std::terminate o std::unexpected. En otras palabras, std::uncaught_exception detecta si desenredo de pila está en curso .
Original:
Detects if the current thread has a live exception object, that is, an exception has been thrown and not yet entered a matching catch clause, std::terminate or std::unexpected. In other words, std::uncaught_exception detects if stack unwinding is currently in progress.
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A veces es más seguro para producir una excepción, incluso mientras std::uncaught_exception() == true. Por ejemplo, si las excepciones son capturadas e ignorados en un destructor, que no se puede propagar fuera de él y no dará lugar a std::terminate .
Original:
Sometimes it's safe to throw an exception even while std::uncaught_exception() == true. For example, if exceptions are caught and ignored in a destructor, they can't propagate out of it and won't lead to std::terminate.
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Contenido |
[editar] Parámetros
(Ninguno)
Original:
(none)
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[editar] Valor de retorno
true si desenredo de pila está actualmente en curso en este hilo .
Original:
true if stack unwinding is currently in progress in this thread.
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[editar] Excepciones
[editar] Ejemplo
#include <iostream> #include <exception> #include <stdexcept> struct Foo { ~Foo() { if (std::uncaught_exception()) { std::cout << "~Foo() called during stack unwinding\n"; } else { std::cout << "~Foo() called normally\n"; } } }; int main() { Foo f; try { Foo f; std::cout << "Exception thrown\n"; throw std::runtime_error("test exception"); } catch (const std::exception& e) { std::cout << "Exception caught: " << e.what() << '\n'; } }
Output:
Exception thrown ~Foo() called during stack unwinding Exception caught: test exception ~Foo() called normally
[editar] Ver también
| función llamada cuando falla el control de excepciones Original: function called when exception handling fails The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función) | |
| (C++11) |
puntero compartido tipo para la manipulación de objetos de excepción Original: shared pointer type for handling exception objects The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (typedef) |
