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std::uncaught_exception

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< cpp‎ | error

 
 
 
Erreur de manipulation
La gestion des exceptions
Original:
Exception handling
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exception
uncaught_exception
exception_ptr (C++11)
make_exception_ptr (C++11)
current_exception (C++11)
rethrow_exception (C++11)
nested_exception (C++11)
throw_with_nested (C++11)
rethrow_if_nested (C++11)
Défaillances de gestion des exceptions
Original:
Exception handling failures
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terminate
terminate_handler
get_terminate (C++11)
set_terminate
unexpected (obsolète)
bad_exception
unexpected_handler (obsolète)
get_unexpected (C++11) (obsolète)
set_unexpected (obsolète)
Catégories d'exception
Original:
Exception categories
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logic_error
invalid_argument
domain_error
length_error
out_of_range
runtime_error
range_error
overflow_error
underflow_error
Les codes d'erreur
Original:
Error codes
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Les codes d'erreur
errno
Les assertions
Original:
Assertions
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assert
system_error installation
Original:
system_error facility
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error_category (C++11)
generic_category (C++11)
system_category (C++11)
error_condition (C++11)
errc (C++11)
error_code (C++11)
system_error (C++11)
 
Defined in header <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

noexcept specification:  
noexcept
   (depuis C++11)

[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
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(fonction) [edit]
type de pointeur partagé pour manipuler des objets d'exception
Original:
shared pointer type for handling exception objects
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(typedef) [edit]

[modifier] Liens externes

GOTW issue 47: Uncaught Exceptions