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1 | /* |
2 | Copyright (c) Marshall Clow 2011-2012. | |
3 | ||
4 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | */ | |
7 | ||
8 | /// \file copy_n.hpp | |
9 | /// \brief Copy n items from one sequence to another | |
10 | /// \author Marshall Clow | |
11 | ||
12 | #ifndef BOOST_ALGORITHM_COPY_N_HPP | |
13 | #define BOOST_ALGORITHM_COPY_N_HPP | |
14 | ||
15 | namespace boost { namespace algorithm { | |
16 | ||
17 | /// \fn copy_n ( InputIterator first, Size n, OutputIterator result ) | |
18 | /// \brief Copies exactly n (n > 0) elements from the range starting at first to | |
19 | /// the range starting at result. | |
20 | /// \return The updated output iterator | |
21 | /// | |
22 | /// \param first The start of the input sequence | |
23 | /// \param n The number of elements to copy | |
24 | /// \param result An output iterator to write the results into | |
25 | /// \note This function is part of the C++2011 standard library. | |
26 | template <typename InputIterator, typename Size, typename OutputIterator> | |
27 | OutputIterator copy_n ( InputIterator first, Size n, OutputIterator result ) | |
28 | { | |
29 | for ( ; n > 0; --n, ++first, ++result ) | |
30 | *result = *first; | |
31 | return result; | |
32 | } | |
33 | }} // namespace boost and algorithm | |
34 | ||
35 | #endif // BOOST_ALGORITHM_COPY_IF_HPP |