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std::uninitialized_copy

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C++
 
Utilities-Bibliothek
 
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
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
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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definiert in Header <memory>
template< class InputIt, class Size, class ForwardIt >
ForwardIt uninitialized_copy_n( InputIt first, Size count, ForwardIt d_first);
 (seit C++11)
Kopien count Elemente aus einer Reihe beginnend bei first auf einen nicht initialisierten Speicherbereich beginnend mit d_first. Die Elemente in der initialisierten Bereich werden mit Hilfe von Copy-Konstruktor .
Original:
Copies count elements from a range beginning at first to an uninitialized memory area beginning at d_first. The elements in the uninitialized area are constructed using copy constructor.
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Wenn eine Ausnahme während der Initialisierung ausgelöst wird, hat die Funktion keine Effekte.
This section is incomplete
Reason: update possible implementation to reflect this
Original:
If an exception is thrown during the initialization, the function has no effects.
This section is incomplete
Reason: update possible implementation to reflect this
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Inhaltsverzeichnis

[Bearbeiten] Parameter

first -
der Anfang der Reihe der Elemente zu kopieren
Original:
the beginning of the range of the elements to copy
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d_first -
der Beginn des Zielbereichs
Original:
the beginning of the destination range
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Type requirements
-
InputIt must meet the requirements of InputIterator.
-
ForwardIt must meet the requirements of ForwardIterator.

[Bearbeiten] Rückgabewert

Iterator das Element nach dem letzten Element kopiert .
Original:
Iterator to the element past the last element copied.
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[Bearbeiten] Komplexität

Linear in count .
Original:
Linear in count.
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[Bearbeiten] Mögliche Implementierung

template<class InputIt, class Size, class ForwardIt>
ForwardIt uninitialized_copy_n(InputIt first, Size count, ForwardIt d_first)
{
    typedef typename std::iterator_traits<ForwardIt>::value_type Value;
    for (; count > 0; ++first, ++d_first, --count) {
        ::new (static_cast<void*>(&*d_first)) Value(*first);
    }
    return d_first;
}

[Bearbeiten] Beispiel

This section is incomplete
Reason: no example

[Bearbeiten] Siehe auch

 kopiert eine Folge von Objekten in einen nicht initialisierten Bereich des Speichers
(Funktions-Template) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/memory/uninitialized_copy_n&oldid=27307“