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std::unique_ptr::release

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< cpp‎ | memory‎ | unique 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 :: unique_ptr
Membri funzioni
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Member functions
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unique_ptr::unique_ptr
unique_ptr::~unique_ptr
unique_ptr::operator=
Modificatori
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Modifiers
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unique_ptr::release
unique_ptr::reset
unique_ptr::swap
Osservatori
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Observers
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unique_ptr::get
unique_ptr::get_deleter
unique_ptr::operator bool
unique_ptr::operator*
unique_ptr::operator->
unique_ptr::operator[]
Non membri funzioni
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Non-member functions
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operator==
operator!=
operator<
operator>
operator<=
operator>
operator>=
std::swap
std::hash
 
pointer release();
 (dal C++11)
Rilascia la proprietà dell'oggetto gestito se presente. get() ritorna nullptr dopo la chiamata.
Original:
Releases the ownership of the managed object if any. get() returns nullptr after the call.
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Indice

[modifica] Parametri

(Nessuno)
Original:
(none)
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[modifica] Valore di ritorno

Puntatore l'oggetto gestito o nullptr se non ci fosse oggetto gestito, cioè il valore che sarebbe tornato dal get() prima della chiamata.
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Pointer to the managed object or nullptr if there was no managed object, i.e. the value which would be returned by get() before the call.
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[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Esempio

#include <memory>
#include <iostream>
 
struct Foo {
    Foo() { std::cout << "Foo\n"; }
    ~Foo() { std::cout << "~Foo\n"; }
};
 
int main()
{
    std::cout << "Creating new Foo...\n";
    std::unique_ptr<Foo> up(new Foo());
 
    std::cout << "About to release Foo...\n";
    Foo* fp = up.release();
 
    if (up.get() == nullptr)
        std::cout << "Foo is no longer owned by unique_ptr...\n";
 
    delete fp;
}

Output: 

Creating new Foo...
Foo
About to release Foo...
Foo is no longer owned by unique_ptr...
~Foo

[modifica] Vedi anche
restituisce un puntatore all'oggetto gestito
Original:
returns a pointer to the managed object
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(metodo pubblico) [modifica]
sostituisce l'oggetto gestito
Original:
replaces the managed object
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(metodo pubblico) [modifica]
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