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std::uninitialized_copy

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< cpp‎ | memory

 
 
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ストレージを初期化されていない
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Uninitialized storage
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uninitialized_copy
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Defined in header <memory>
template< class InputIt, class ForwardIt >
ForwardIt uninitialized_copy( InputIt first, InputIt last, ForwardIt d_first );
[first, last)で始まる初期化されていないメモリ領域への範囲d_firstからコピーが要素。初期化されていない領域内の要素は、コピーコンストラクタを使用して構築されてい.
Original:
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.
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目次

[編集] パラメータ

first, last -
コピーする要素の範囲
Original:
the range of the elements to copy
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d_first -
目的の範囲の始まり
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.

[編集] 値を返します

コピーされた最後の要素過去の要素を指すイテレータ.
Original:
Iterator to the element past the last element copied.
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[編集] 複雑

firstlastとの間の距離の線形
Original:
Linear in the distance between first and last
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[編集] 可能な実装

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;
}

[編集]

[編集] も参照してください

メモリの初期化されていない領域へのオブジェクトの数をコピーします
Original:
copies a number of objects to an uninitialized area of memory
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(関数テンプレート) [edit]