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std::uninitialized_copy

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< cpp‎ | memory
Revision as of 14:32, 2 November 2012 by P12bot (Talk | contribs)

 
 
 
 
Defined in header <memory>
template< class InputIt, class ForwardIt >
ForwardIt uninitialized_copy( InputIt first, InputIt last, ForwardIt d_first );

Copies elements from the range [first, last) to an uninitialized memory area beginning at d_first. The elements in the uninitialized area are constructed using copy constructor.

Contents

Parameters

first, last - the range of the elements to copy
d_first - the beginning of the destination range
Type requirements
-
InputIt must meet the requirements of InputIterator.
-
ForwardIt must meet the requirements of ForwardIterator.

Return value

Iterator to the element past the last element copied.

Complexity

Linear in the distance between first and last

Possible implementation

template<class InputIt, class ForwardIt>
ForwardIt uninitialized_copy(InputIt first, InputIt last, ForwardIt d_first)
{
    typedef typename std::iterator_traits<ForwardIt>::value_type Value;
    for (; first != last; ++first, ++d_first) {
        ::new (static_cast<void*>(&*d_first)) Value(*first);
    }
    return d_first;
}

Example

See also

Template:cpp/memory/dcl list uninitialized copy n