std::uncaught_exception
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<tbody> </tbody>| Dclar dans l'en-tte <exception>
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bool uncaught_exception(); |
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Dtecte si le thread actuel a un objet d'exception en direct, qui est, une exception a t leve et n'est pas encore entr dans une clause catch correspondant, std::terminate ou std::unexpected. En d'autres termes, std::uncaught_exception dtecte si la pile dnouement 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 sr de lever une exception mme si
std::uncaught_exception() == true. Par exemple, si des exceptions sont capturs et ignor dans un destructeur, ils ne peuvent pas se propager hors de lui et ne conduira pas 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.The text has been machine-translated via Google Translate.
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Paramtres
(Aucun)
Original:
(none)
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Retourne la valeur
true si la pile dnouement est actuellement en cours dans ce fil .Original:
true if stack unwinding is currently in progress in this thread.The text has been machine-translated via Google Translate.
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Exceptions
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';
}
}
Rsultat :
Exception thrown
~Foo() called during stack unwinding
Exception caught: test exception
~Foo() called normally
Voir aussi
la fonction appele lorsque la gestion des exceptions choue 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 partag 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) |