Varianti

    std::pointer_traits

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    <metanoindex/>

     
    C++
     
    Utilità libreria
    Tipo di supporto (basic types, RTTI, type traits)
    Gestione della memoria dinamica
    La gestione degli errori
    Programma di utilità
    Funzioni variadic
    Data e ora
    Funzione oggetti
    initializer_list(C++11)
    bitset
    hash(C++11)
    Gli operatori relazionali
    Original:
    Relational operators
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    rel_ops::operator!=
    rel_ops::operator>
    rel_ops::operator<=
    rel_ops::operator>=
    Coppie e tuple
    Original:
    Pairs and tuples
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    pair
    tuple(C++11)
    piecewise_construct_t(C++11)
    piecewise_construct(C++11)
    Swap, in avanti e spostare
    Original:
    Swap, forward and move
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    swap
    forward(C++11)
    move(C++11)
    move_if_noexcept(C++11)
    declval(C++11)
     
    Gestione della memoria dinamica
    Basso livello di gestione della memoria
    Allocatori
    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 inizializzata stoccaggio
    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
    Puntatori intelligenti
    Original:
    Smart pointers
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    unique_ptr(C++11)
    shared_ptr(C++11)
    weak_ptr(C++11)
    auto_ptr(deprecato)
    owner_less(C++11)
    enable_shared_from_this(C++11)
    bad_weak_ptr(C++11)
    default_delete(C++11)
    Garbage collection supporto
    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)
    Varie
    Original:
    Miscellaneous
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    pointer_traits(C++11)
    addressof(C++11)
    align(C++11)
    C Library
    Original:
    C Library
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    <tbody> </tbody>
    Elemento definito nell'header <memory>
    template< class Ptr > struct pointer_traits;
    		 (1) (dal C++11)
    template< class T > struct pointer_traits<T*>;
    		 (2) (dal C++11)
    Il modello di classe pointer_traits fornisce il modo standard per accedere alle proprietà di alcuni tipi di puntatore di tipo. Il std::allocator_traits modello standard si basa su pointer_traits per determinare le impostazioni predefinite per diversi typedef richiede da Allocator.
    Original:
    The pointer_traits class template provides the standardized way to access certain properties of pointer-like types. The standard template std::allocator_traits relies on pointer_traits to determine the defaults for various typedefs requires by Allocator.
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    1)

    Il non specializzato pointer_traits dichiara i seguenti tipi:
    Original:
    The non-specialized pointer_traits declares the following types:
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    Membri tipi

    Tipo
    Original:
    Type
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    		 Definition
    pointer Ptr
    element_type
    Ptr::element_type se presente. In caso contrario, se T Ptr è un Template<T, Args...> istanziazione di template
    Original:
    Ptr::element_type if present. Otherwise T if Ptr is a template instantiation Template<T, Args...>
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    difference_type
    Ptr::difference_type se presente, altrimenti std::ptrdiff_t
    Original:
    Ptr::difference_type if present, otherwise std::ptrdiff_t
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    Membri alias modelli

    Template
    Original:
    Template
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    		 Definition
    template <class U> using rebind
    Ptr::rebind<U> se esiste, altrimenti se Tempate<U, Args...> Ptr è un Template<T, Args...> istanziazione di template
    Original:
    Ptr::rebind<U> if exists, otherwise Tempate<U, Args...> if Ptr is a template instantiation Template<T, Args...>
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    Membri funzioni

    [statico]
    ottiene un puntatore dereferencable al suo argomento
    Original:
    obtains a dereferencable pointer to its argument
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    (metodo pubblico statico)

    2)

    Una specializzazione è previsto per i tipi di puntatore, T*, che dichiara i seguenti tipi
    Original:
    A specialization is provided for pointer types, T*, which declares the following types
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    Membri tipi

    Tipo
    Original:
    Type
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    		 Definition
    pointer T*
    element_type T
    difference_type std::ptrdiff_t

    Membri alias modelli

    Template
    Original:
    Template
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    		 Definition
    template< class U > using rebind U*

    Membri funzioni

    [statico]
    ottiene un puntatore dereferencable al suo argomento}
    Original:
    obtains a dereferencable pointer to its argument}
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    (metodo pubblico statico)

    Note

    Le riassociare alias modello utente permette, dato un puntatore come tipo che punta a T, per ottenere lo stesso puntatore come tipo che punta a U. Per esempio,
    Original:
    The rebind member template alias makes it possible, given a pointer-like type that points to T, to obtain the same pointer-like type that points to U. For example,
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    std :: is_same <std :: pointer_traits <std :: shared_ptr <int>> :: Rebind <double>, std :: unique_ptr <double>> :: valore), "")
    Original:
    std::is_same<std::pointer_traits< std::shared_ptr<int>>::rebind<double>, std::unique_ptr<double> >::value), "")
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