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    std::uncaught_exception

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    <metanoindex/>

     
    C++
     
    Bibliothèque d'utilitaires
     
    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)
     
    <tbody> </tbody>
    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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    Paramètres

    (Aucun)
    Original:
    (none)
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    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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    Exceptions

    noexcept specification:  
    <tbody> </tbody>
    noexcept
       (depuis C++11)

    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

    Voir aussi
    la fonction appelée lorsque la gestion des exceptions échoue
    Original:
    function called when exception handling fails
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    (fonction) [edit]
    (C++11)
    type de pointeur partagé pour manipuler des objets d'exception
    Original:
    shared pointer type for handling exception objects
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    (typedef) [edit]

    Liens externes

    GOTW issue 47: Uncaught Exceptions