std::exception_ptr
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Déclaré dans l'en-tête <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.The text has been machine-translated via Google Translate.
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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.The text has been machine-translated via Google Translate.
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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.The text has been machine-translated via Google Translate.
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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.The text has been machine-translated via Google Translate.
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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.The text has been machine-translated via Google Translate.
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[modifier]Exemple
#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(conststd::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
(C++11) | crée un std::exception_ptr à partir d'un objet d'exception Original: creates an std::exception_ptr from an exception object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) |
(C++11) | capture l'exception en cours dans un std::exception_ptr Original: captures the current exception in a std::exception_ptr 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) | lève l'exception d'un std::exception_ptr Original: throws the exception from an std::exception_ptr The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) |
