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std::exception_ptr

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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
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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
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Error codes
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Les codes d'erreur
errno
Les assertions
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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>
typedef /*unspecified*/ exception_ptr;
(depuis C++11)
std::exception_ptr est un nullable pointeur comme le type qui gère un objet d'exception qui a été levée et capturé avec std::current_exception. Une instance de std::exception_ptr peut être transmise à une autre fonction, peut-être sur un autre thread, où l'exception peut-être relancée et manipulé avec une clause catch .
Original:
std::exception_ptr is a nullable pointer-like type that manages an exception object which has been thrown and captured with std::current_exception. An instance of std::exception_ptr may be passed to another function, possibly on another thread, where the exception may be rethrown and handled with a catch clause.
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Par défaut, construit std::exception_ptr est un pointeur NULL, il ne pointe pas vers un objet d'exception .
Original:
Default-constructed std::exception_ptr is a null pointer, it does not point to an exception object.
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Deux instances de std::exception_ptr comparer égales seulement si elles sont à la fois nulle ou deux points à l'objet même exception .
Original:
Two instances of std::exception_ptr compare equal only if they are both null or both point at the same exception object.
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std::exception_ptr n'est pas convertible implicitement en aucun calcul, dénombrement, ou de type pointeur. Il est convertible en bool .
Original:
std::exception_ptr is not implicitly convertible to any arithmetic, enumeration, or pointer type. It is convertible to bool.
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L'objet exception référencée par une std::exception_ptr reste valable tant qu'il reste au moins un std::exception_ptr qui est son référencement: std::exception_ptr est un pointeur la copropriété intelligente .
Original:
The exception object referenced by an std::exception_ptr remains valid as long as there remains at least one std::exception_ptr that is referencing it: std::exception_ptr is a shared-ownership smart pointer.
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[modifier] Exemple

[edit]
#include <iostream>
#include <string>
#include <exception>
#include <stdexcept>
 
void handle_eptr(std::exception_ptr eptr) // passing by value is ok
{
    try {
        if (eptr != std::exception_ptr()) {
            std::rethrow_exception(eptr);
        }
    } catch(const std::exception& e) {
        std::cout << "Caught exception \"" << e.what() << "\"\n";
    }
}
 
int main()
{
    std::exception_ptr eptr;
    try {
        std::string().at(1); // this generates an std::out_of_range
    } catch(...) {
        eptr = std::current_exception(); // capture
    }
    handle_eptr(eptr);
} // destructor for std::out_of_range called here, when the eptr is destructed

Résultat :

Caught exception "basic_string::at"

[modifier] Voir aussi

crée un std::exception_ptr à partir d'un objet d'exception
Original:
creates an std::exception_ptr from an exception object
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(fonction générique) [edit]
capture l'exception en cours dans un std::exception_ptr
Original:
captures the current exception in a std::exception_ptr
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(fonction) [edit]
lève l'exception d'un std::exception_ptr
Original:
throws the exception from an std::exception_ptr
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(fonction) [edit]