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std::allocator_traits::construct

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C++
 
Dynamische Speicherverwaltung
Low-Level-Speicherverwaltung
Zuweiser
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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)
Initialisierter Speicher
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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
Intelligente Zeiger
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Smart pointers
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unique_ptr(C++11)
shared_ptr(C++11)
weak_ptr(C++11)
auto_ptr(veraltet)
owner_less(C++11)
enable_shared_from_this(C++11)
bad_weak_ptr(C++11)
default_delete(C++11)
Garbage Collection Unterstützung
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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)
Verschiedenes
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Miscellaneous
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pointer_traits(C++11)
addressof(C++11)
align(C++11)
C-Bibliothek
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C Library
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std::allocator_traits
Member-Funktionen
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
 
definiert in Header <memory>
template< class T, class... Args >
static void construct( Alloc& a, T* p, Args&&... args );
 (seit C++11)
Wenn möglich, baut ein Objekt vom Typ T in zugewiesenen initialisierten Speicher, auf den p, indem
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)...)

Wenn die oben nicht möglich ist (zB a nicht die Member-Funktion construct(),), dann ruft Placement-new als
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)...)

Inhaltsverzeichnis

[Bearbeiten] Parameter

a -
allocator um zur Konstruktion verwenden
Original:
allocator to use for construction
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args... -
die Konstruktorargumente zu a.construct() oder placement-neue passieren
Original:
the constructor arguments to pass to a.construct() or to placement-new
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[Bearbeiten] Rückgabewert

(None)
Original:
(none)
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[Bearbeiten] Notes

Diese Funktion wird durch die Standard-Bibliothek Behälter verwendet werden, wenn das Einfügen, Kopieren oder Verschieben Elementen .
Original:
This function is used by the standard library containers when inserting, copying, or moving elements.
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Da diese Funktion ermöglicht die automatische Fallback, um die Platzierung neuer, die Member-Funktion construct() ist ein optionales Allocator Anforderung, da 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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[Bearbeiten] Siehe auch

 Speicheranforderungsfunktion
(Funktion) [edit]
baut ein Objekt in zugewiesenen Lagerstätten
Original:
constructs an object in allocated storage
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(öffentliche Elementfunktion of std::allocator) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/memory/allocator_traits/construct&oldid=27236“