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std::static_pointer_cast, std::dynamic_pointer_cast, std::const_pointer_cast

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< cpp‎ | memory‎ | shared ptr

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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
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Coppie e tuple
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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
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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
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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 inizializzata stoccaggio
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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
Puntatori intelligenti
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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
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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
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Miscellaneous
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pointer_traits(C++11)
addressof(C++11)
align(C++11)
C Library
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C Library
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std::shared_ptr
Membri funzioni
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Member functions
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shared_ptr::shared_ptr
shared_ptr::~shared_ptr
shared_ptr::operator=
Modificatori
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Modifiers
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shared_ptr::reset
shared_ptr::swap
Osservatori
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Observers
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shared_ptr::get
shared_ptr::operator*
shared_ptr::operator->
shared_ptr::use_count
shared_ptr::unique
shared_ptr::operator bool
shared_ptr::owner_before
Non membri funzioni
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Non-member functions
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std::swap
make_shared
allocate_shared
static_pointer_cast
dynamic_pointer_cast
const_pointer_cast
get_deleter
operator==
operator|=
operator<
operator<=
operator>
operator>=
operator<<
atomic_is_lock_free
atomic_load
atomic_load_explicit
atomic_store
atomic_store_explicit
atomic_exchange
atomic_exchange_explicit
atomic_compare_exchange_weak
atomic_compare_exchange_strong
atomic_compare_exchange_weak_explicit
atomic_compare_exchange_strong_explicit
std::hash
 
template< class T, class U >
shared_ptr<T> static_pointer_cast( const shared_ptr<U>& r );
 (1) (dal C++11)
template< class T, class U >
shared_ptr<T> dynamic_pointer_cast( const shared_ptr<U>& r );
 (2) (dal C++11)
template< class T, class U >
shared_ptr<T> const_pointer_cast( const shared_ptr<U>& r );
 (3) (dal C++11)
Può restituire una nuova istanza di std::shared_ptr con un tipo di fuso oggetto gestito dal tipo di oggetto gestito il r di. Entrambi i puntatori intelligenti condividerà la proprietà dell'oggetto gestito.
Original:
Will return a new instance of std::shared_ptr with a casted managed object type from the r's managed object type. Both smart pointers will share the ownership of the managed object.
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L'oggetto gestito std::shared_ptr risultante sarà ottenuto chiamando il numero (in ordine rispettivamente):
Original:
The resulting std::shared_ptr's managed object will be obtained by calling (in respective order):
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1) static_cast<T*>(r.get()).
2)
dynamic_cast<T*>(r.get()) (Se il risultato del dynamic_cast è 0, il shared_ptr restituito sarà vuoto).
Original:
dynamic_cast<T*>(r.get()) (If the result of the dynamic_cast is 0, the returned shared_ptr will be empty).
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3) const_cast<T*>(r.get()).
In ogni caso, se il parametro è un r std::shared_ptr vuota il risultato sarà una nuova std::shared_ptr vuoto.
Original:
In any case, if the parameter r is an empty std::shared_ptr the result will be a new empty std::shared_ptr.
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[modifica] Parametri

r -
Il puntatore da convertire
Original:
The pointer to convert
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[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/memory/shared_ptr/pointer_cast&oldid=26171"