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std::allocator_traits::construct

Da cppreference.com.

 
 
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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std::allocator_traits
Membri funzioni
Original:
Member functions
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allocator_traits::allocate
allocator_traits::deallocate
allocator_traits::construct
allocator_traits::destroy
allocator_traits::max_size
allocator_traits::select_on_container_copy_construction
 
Defined in header <memory>
template< class T, class... Args >
static void construct( Alloc& a, T* p, Args&&... args );
(dal C++11)
Se possibile, costruisce un oggetto di tipo T in memoria non inizializzata assegnato puntato da p, chiamando
Original:
If possible, constructs an object of type T in allocated uninitialized storage pointed to by p, by calling
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a.construct(p, std::forward<Args>(args)...)

Se quanto sopra non è possibile (ad esempio a non ha la funzione di membro construct(),), quindi chiama posizionamento nuovo
Original:
If the above is not possible (e.g. a does not have the member function construct(),), then calls placement-new as
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    ::new (static_cast<void*>(p)) T(std::forward<Args>(args)...)

Indice

[modifica] Parametri

a -
allocatore di utilizzare per la costruzione
Original:
allocator to use for construction
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args... -
gli argomenti da passare al costruttore a.construct() o per posizionamento nuovo
Original:
the constructor arguments to pass to a.construct() or to placement-new
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[modifica] Valore di ritorno

(Nessuno)
Original:
(none)
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[modifica] Note

Questa funzione viene utilizzata dai contenitori della libreria standard quando si inserisce, la copia, o elementi in movimento.
Original:
This function is used by the standard library containers when inserting, copying, or moving elements.
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Poiché questa funzione fornisce la caduta automatico verso il nuovo posizionamento, la construct() funzione membro è un requisito Allocator opzionale visto che il C + 11.
Original:
Because this function provides the automatic fall back to placement new, the member function construct() is an optional Allocator requirement since C++11.
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[modifica] Vedi anche

allocazione funzioni
Original:
allocation functions
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(funzione) [edit]
costruisce un oggetto nella memoria allocata
Original:
constructs an object in allocated storage
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(membro pubblico of std::allocator funzione) [edit]