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    std::scoped_allocator_adaptor::construct

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    <metanoindex/>

     
    C++
     
    La gestion dynamique de la mémoire
    Faible niveau de gestion de la mémoire
    Répartiteurs
    Original:
    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
    Original:
    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
    Original:
    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
    Original:
    Garbage collection support
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    declare_reachable (C++11)
    undeclare_reachable (C++11)
    declare_no_pointers (C++11)
    undeclare_no_pointers (C++11)
    pointer_safety (C++11)
    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
    Original:
    C Library
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    std::scoped_allocator_adaptor
    Les fonctions membres
    Original:
    Member functions
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    scoped_allocator_adaptor::scoped_allocator_adaptor
    scoped_allocator_adaptor::~scoped_allocator_adaptor
    scoped_allocator_adaptor::inner_allocator
    scoped_allocator_adaptor::outer_allocator
    scoped_allocator_adaptor::allocate
    scoped_allocator_adaptor::deallocate
    scoped_allocator_adaptor::max_size
    scoped_allocator_adaptor::construct
    scoped_allocator_adaptor::destroy
    scoped_allocator_adaptor::select_on_container_copy_construction
    Tiers fonctions
    Original:
    Non-member functions
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    operator==
    operator!=
     
    <tbody> </tbody>
    Déclaré dans l'en-tête <scoped_allocator>
    template < class T, class... Args > void construct( T* p, Args&&... args )
    		 (1)
    template< class T1, class T2, class... Args1, class... Args2 > void construct( std::pair<T1, T2>* p, std::piecewise_construct_t, std::tuple<Args1...> x, std::tuple<Args2...> y )
    		 (2)
    template< class T1, class T2 > void construct( std::pair<T1, T2>* p )
    		 (3)
    template< class T1, class T2, class U, class V > void construct( std::pair<T1, T2>* p, U&& x, V&& y )
    		 (4)
    template< class T1, class T2, class U, class V > void construct( std::pair<T1, T2>* p, const std::pair<U, V>& xy )
    		 (5)
    template< class T1, class T2, class U, class V > void construct( std::pair<T1, T2>* p, std::pair<U, V>&& xy );
    		 (6)
    Construit un objet dans alloué, mais pas de stockage initialisé pointé par p utilisant OuterAllocator et les arguments du constructeur fournis. Si l'objet est de type que lui-même utilise les répartiteurs, ou si elle est std :: pair, passe InnerAllocator vers l'objet construit .
    Original:
    Constructs an object in allocated, but not initialized storage pointed to by p using OuterAllocator and the provided constructor arguments. If the object is of type that itself uses allocators, or if it is std::pair, passes InnerAllocator down to the constructed object.
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    Tout d'abord, détermine le type d'allocation extérieur OUTERMOST: c'est le type qui doit être retourné en appelant this->outer_allocator(), puis en appelant la fonction membre outer_allocator() récursivement sur le résultat de cet appel jusqu'à ce qu'il atteigne le type qui n'a pas de fonction membre. Ce type est l'allocateur extérieur .
    Original:
    First, determines the outermost allocator type OUTERMOST: it is the type that would be returned by calling this->outer_allocator(), and then calling the outer_allocator() member function recursively on the result of this call until reaching the type that has no such member function. That type is the outermost allocator.
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    Puis:
    Original:
    Then:
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    1)

    Si std::uses_allocator<T, inner_allocator_type>::value==false (le type de T ne pas utiliser les répartiteurs) et si std::is_constructible<T, Args...>::value==true, puis appelle
    Original:
    If std::uses_allocator<T, inner_allocator_type>::value==false (the type T does not use allocators) and if std::is_constructible<T, Args...>::value==true, then calls
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    std::allocator_traits<OUTERMOST>::construct( OUTERMOST(*this), p, std::forward<Args>(args)... );

    Sinon, si std::uses_allocator<T, inner_allocator_type>::value==true (le T type utilise les répartiteurs, par exemple, il s'agit d'un conteneur) et si std::is_constructible<T, std::allocator_arg_t, inner_allocator_type, Args...>::value==true, puis appelle
    Original:
    Otherwise, if std::uses_allocator<T, inner_allocator_type>::value==true (the type T uses allocators, e.g. it is a container) and if std::is_constructible<T, std::allocator_arg_t, inner_allocator_type, Args...>::value==true, then calls
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    std::allocator_traits<OUTERMOST>::construct( OUTERMOST(*this), p, std::allocator_arg, inner_allocator(), std::forward<Args>(args)... );

    Sinon, std::uses_allocator<T, inner_allocator_type>::value==true (le T type utilise les répartiteurs, par exemple, il s'agit d'un conteneur) et si std::is_constructible<T, Args..., inner_allocator_type>::value==true, puis appelle
    Original:
    Otherwise, std::uses_allocator<T, inner_allocator_type>::value==true (the type T uses allocators, e.g. it is a container) and if std::is_constructible<T, Args..., inner_allocator_type>::value==true, then calls
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    std::allocator_traits<OUTERMOST>::construct( OUTERMOST(*this), p, std::forward<Args>(args)..., inner_allocator());

    Dans le cas contraire, une erreur de compilation est émis, car même si std::uses_allocator<T> affirmé que T est allocateur-conscient, il lui manque les deux formes de l'allocateur acceptant les constructeurs .
    Original:
    Otherwise, compilation error is issued because although std::uses_allocator<T> claimed that T is allocator-aware, it lacks either form of allocator-accepting constructors.
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    2)

    Tout d'abord, si l'une ou T1 T2 est allocateur-courant, modifie les tuples x et y d'inclure l'allocation appropriée intérieure, résultant dans les deux nouveaux tuples xprime et yprime, selon les trois règles suivantes:
    Original:
    First, if either T1 or T2 is allocator-aware, modifies the tuples x and y to include the appropriate inner allocator, resulting in the two new tuples xprime and yprime, according to the following three rules:
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    2a) si T1 n'est pas d'allocation-aware (std::uses_allocator<T1, inner_allocator_type>::value==false, puis xprime est x, non modifié. (Il est également nécessaire que std::is_constructible<T1, Args1...>::value==true)
    Original:
    2a) if T1 is not allocator-aware (std::uses_allocator<T1, inner_allocator_type>::value==false, then xprime is x, unmodified. (it is also required that std::is_constructible<T1, Args1...>::value==true)
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    2b) si T1 est allocateur-aware (std::uses_allocator<T1, inner_allocator_type>::value==true), et son constructeur prend un tag allocateur ( std::is_constructible<T1, std::allocator_arg_t, inner_allocator_type, Args1...>::value==true, puis xprime est
    Original:
    2b) if T1 is allocator-aware (std::uses_allocator<T1, inner_allocator_type>::value==true), and its constructor takes an allocator tag (std::is_constructible<T1, std::allocator_arg_t, inner_allocator_type, Args1...>::value==true, then xprime is
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    std::tuple_cat( std::tuple<std::allocator_arg_t, inner_allocator_type&>( std::allocator_arg, inner_allocator_type() ), x)

    2c) si T1 est allocateur-aware (std::uses_allocator<T1, inner_allocator_type>::value==true), et son constructeur prend l'allocateur comme dernier argument (std::is_constructible<T1, Args1..., inner_allocator_type>::value==true), puis xprime est std::tuple_cat(x, std::tuple<inner_allocator_type&>(inner_allocator_type())) .
    Original:
    2c) if T1 is allocator-aware (std::uses_allocator<T1, inner_allocator_type>::value==true), and its constructor takes the allocator as the last argument (std::is_constructible<T1, Args1..., inner_allocator_type>::value==true), then xprime is std::tuple_cat(x, std::tuple<inner_allocator_type&>(inner_allocator_type())).
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    Les mêmes règles s'appliquent à T2 et le remplacement de y avec yprime
    Original:
    Same rules apply to T2 and the replacement of y with yprime
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    Une fois xprime et yprime sont construits (ce qui exige aussi que tous les types de args1 ... et ... Args2 sont CopyConstructible), construit le p paire de stockage alloué par téléphone
    Original:
    Once xprime and yprime are constructed (this also requires that all types in Args1... and Args2... are CopyConstructible), constructs the pair p in allocated storage by calling
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    std::allocator_traits<OUTERMOST>::construct( OUTERMOST(*this), p, std::piecewise_construct, xprime, yprime);


    3)

    Équivalent à construct(p, std::piecewise_construct, std::tuple<>(), std::tuple<>()), c'est-à-passe interne sur le dispositif d'attribution de types de membres de la paire s'ils les acceptent .
    Original:
    Equivalent to construct(p, std::piecewise_construct, std::tuple<>(), std::tuple<>()), that is, passes the inner allocator on to the pair's member types if they accept them.
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    4)

    Équivalent à
    Original:
    Equivalent to
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    construct(p, std::piecewise_construct, std::forward_as_tuple(std::forward<U>(x)), std::forward_as_tuple(std::forward<V>(y)))

    5)

    Équivalent à
    Original:
    Equivalent to
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    construct(p, std::piecewise_construct, std::forward_as_tuple(xy.first), std::forward_as_tuple(xy.second))

    6)

    Équivalent à
    Original:
    Equivalent to
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    construct(p, std::piecewise_construct, std::forward_as_tuple(std::forward<U>(xy.first)), std::forward_as_tuple(std::forward<V>(xy.second)))

    Paramètres

    p -
    pointeur alloué, mais non initialisé stockage
    Original:
    pointer to allocated, but not initialized storage
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    args... -
    le constructeur arguments à passer au constructeur de T
    Original:
    the constructor arguments to pass to the constructor of T
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    x -
    le constructeur arguments à passer au constructeur de T1
    Original:
    the constructor arguments to pass to the constructor of T1
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    y -
    le constructeur arguments à passer au constructeur de T2
    Original:
    the constructor arguments to pass to the constructor of T2
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    xy -
    la paire dont les deux membres sont les arguments du constructeur pour T1 et T2
    Original:
    the pair whose two members are the constructor arguments for T1 and T2
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    Retourne la valeur

    (Aucun)
    Original:
    (none)
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    Notes

    Cette fonction est appelée (par std::allocator_traits) par n'importe quel objet allocateur-courant, comme std::vector, qui a été donné un std::scoped_allocator_adaptor que l'allocateur à utiliser. Depuis inner_allocator est elle-même une instance de std::scoped_allocator_adaptor, cette fonction sera également appelée lorsque l'objet allocateur-aware construits par cette fonction démarre la construction de leurs propres membres .
    Original:
    This function is called (through std::allocator_traits) by any allocator-aware object, such as std::vector, that was given a std::scoped_allocator_adaptor as the allocator to use. Since inner_allocator is itself an instance of std::scoped_allocator_adaptor, this function will also be called when the allocator-aware objects constructed through this function start constructing their own members.
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    Voir aussi

    [
    statique
    Original:
    static
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    ]
    construit un objet à l'emplacement alloué
    Original:
    constructs an object in the allocated storage
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    (fonction générique) [edit]
    construit un objet de stockage alloué
    Original:
    constructs an object in allocated storage
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    (fonction membre publique de std::allocator) [edit]