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std::uninitialized_fill_n

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uninitialized_fill_n
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Defined in header <memory>
template< class ForwardIt, class Size, class T >
void uninitialized_fill_n( ForwardIt first, Size count, const T& value )

Copies the given value value to the first count elements in an uninitialized memory area beginning at first. The elements in the uninitialized area are constructed using copy constructor.

Inhaltsverzeichnis

[Bearbeiten] Parameter

first - the beginning of the range of the elements to initialize
count - number of elements to construct
value -
der Wert auf die Elemente mit zu bauen
Original:
the value to construct the elements with
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Type requirements
-
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 ForwardIt, class Size, class T >
void uninitialized_fill_n(ForwardIt first, Size count
                          const T& value)
{
    typedef typename std::iterator_traits<ForwardIt>::value_type Value;
    for (; count > 0; ++first, --count) {
        ::new (static_cast<void*>(&*first)) Value(value);
    }
    return first;
}

[Bearbeiten] Beispiel

[Bearbeiten] Siehe auch

kopiert ein Objekt in einem nicht initialisierten Bereich des Speichers
Original:
copies an object to an uninitialized area of memory
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(Funktions-Template) [edit]