std::uncaught_exception
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| Déclaré dans l'en-tête <exception>
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| bool uncaught_exception(); |
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Détecte si le thread actuel a un objet d'exception en direct, qui est, une exception a été levée et n'est pas encore entré dans une clause catch correspondant, std::terminate ou std::unexpected. En d'autres termes, std::uncaught_exception détecte si la pile dénouement est actuellement en cours .
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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Parfois, il est sûr de lever une exception même si std::uncaught_exception() == true. Par exemple, si des exceptions sont capturés et ignoré dans un destructeur, ils ne peuvent pas se propager hors de lui et ne conduira pas à 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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Sommaire |
[modifier] Paramètres
(Aucun)
Original:
(none)
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[modifier] Retourne la valeur
true si la pile dénouement est actuellement en cours dans ce fil .
Original:
true if stack unwinding is currently in progress in this thread.
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[modifier] Exceptions
[modifier] Exemple
#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'; } }
Résultat :
Exception thrown ~Foo() called during stack unwinding Exception caught: test exception ~Foo() called normally
[modifier] Voir aussi
| la fonction appelée lorsque la gestion des exceptions échoue 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. (fonction) | |
| (C++11) |
type de pointeur partagé pour manipuler des objets d'exception 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) |
