std::uncaught_exception
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Déclaré dans l'en-tête <exception> | ||
bool uncaught_exception(); | ||
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";throwstd::runtime_error("test exception");}catch(conststd::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) |
