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    std::enable_shared_from_this::shared_from_this

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    <metanoindex/>

     
    C++
     
    Bibliothèque d'utilitaires
     
    La gestion dynamique de la mémoire
    Faible niveau de gestion de la mémoire
    Répartiteurs
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    Allocators
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    allocator
    allocator_traits (C++11)
    allocator_arg_t (C++11)
    allocator_arg (C++11)
    uses_allocator (C++11)
    scoped_allocator_adaptor (C++11)
    Non initialisée stockage
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    Uninitialized storage
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    uninitialized_copy
    uninitialized_copy_n (C++11)
    uninitialized_fill
    uninitialized_fill_n
    raw_storage_iterator
    get_temporary_buffer
    return_temporary_buffer
    Pointeurs intelligents
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    Smart pointers
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    unique_ptr (C++11)
    shared_ptr (C++11)
    weak_ptr (C++11)
    auto_ptr (obsolète)
    owner_less (C++11)
    enable_shared_from_this (C++11)
    bad_weak_ptr (C++11)
    default_delete (C++11)
    Soutien garbage collection
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    Garbage collection support
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    declare_reachable (C++11)
    undeclare_reachable (C++11)
    declare_no_pointers (C++11)
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    get_pointer_safety (C++11)
    Divers
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    Miscellaneous
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    pointer_traits (C++11)
    addressof (C++11)
    align (C++11)
    Bibliothèque C
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    C Library
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    std::enable_shared_from_this
    Protégé fonctions membres
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    Protected member functions
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    enable_shared_from_this::enable_shared_from_this
    enable_shared_from_this::~enable_shared_from_this
    enable_shared_from_this::operator=
    Fonctions membres publiques
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    Public member functions
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    enable_shared_from_this::shared_from_this
     
    <tbody> </tbody>
    shared_ptr<T> shared_from_this();
    		 (1)
    shared_ptr<T const> shared_from_this() const;
    		 (2)
    Retourne une std::shared_ptr<T> qui partage la propriété de *this avec tous std::shared_ptr<T> existant qui se réfèrent à *this .
    Original:
    Returns a std::shared_ptr<T> that shares ownership of *this with all existing std::shared_ptr<T> that refer to *this.
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    Notes

    Avant d'appeler shared_from_this, il devrait y avoir au moins un std::shared_ptr<T> p qui possède *this .
    Original:
    Before calling shared_from_this, there should be at least one std::shared_ptr<T> p that owns *this.
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    Retourne la valeur

    std::shared_ptr<T> qui partage la propriété avec des *this préexistantes std::shared_ptr<T>s
    Original:
    std::shared_ptr<T> that shares ownership of *this with pre-existing std::shared_ptr<T>s
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    Exemple

    #include <iostream>
#include <memory>

struct Foo : public std::enable_shared_from_this<Foo> {
    Foo() { std::cout << "Foo::Foo\n"; }
    ~Foo() { std::cout << "Foo::~Foo\n"; } 
    std::shared_ptr<Foo> getFoo() { return shared_from_this(); }
};

int main() {
    Foo *f = new Foo;
    std::shared_ptr<Foo> pf1;

    {
        std::shared_ptr<Foo> pf2(f);
        pf1 = pf2->getFoo();  // shares ownership of object with pf2
    }

    std::cout << "pf2 is gone\n";   
}

    Résultat : 

    Foo::Foo
pf2 is gone
Foo::~Foo

    Voir aussi

    (C++11)
    		 pointeur intelligent avec sémantique de propriétaires partagés
    (classe générique) [edit]