std::allocator_traits::construct

 

C++

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Libreria matematca

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Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Gestione della memoria dinamica

Basso livello di gestione della memoria
Allocatori Original: Allocators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
pointer_traits (C++11)
addressof (C++11)
align (C++11)
C Library Original: C Library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
malloc calloc	realloc free

 

std::allocator_traits

Membri funzioni Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

allocator_traits::allocate

allocator_traits::deallocate

allocator_traits::construct

allocator_traits::destroy

allocator_traits::max_size

allocator_traits::select_on_container_copy_construction

 

Elemento definito nell'header <memory>
template<class T, class... Args> staticvoid 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)...)

Parametri

a	-	allocatore di utilizzare per la costruzione Original: allocator to use for construction The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

(Nessuno)

Original:

(none)

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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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Vedi anche

operator new operator new[]	allocazione funzioni Original: allocation functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
construct	costruisce un oggetto nella memoria allocata Original: constructs an object in allocated storage The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)