| 1 | /* |
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| 2 | Copyright (c) Marshall Clow 2011-2012. |
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| 3 | |
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| 4 | Distributed under the Boost Software License, Version 1.0. (See accompanying |
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| 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | */ |
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| 7 | |
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| 8 | /// \file copy_n.hpp |
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| 9 | /// \brief Copy n items from one sequence to another |
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| 10 | /// \author Marshall Clow |
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| 11 | |
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| 12 | #ifndef BOOST_ALGORITHM_COPY_N_HPP |
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| 13 | #define BOOST_ALGORITHM_COPY_N_HPP |
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| 14 | |
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| 15 | #include <boost/config.hpp> |
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| 16 | |
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| 17 | namespace boost { namespace algorithm { |
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| 18 | |
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| 19 | /// \fn copy_n ( InputIterator first, Size n, OutputIterator result ) |
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| 20 | /// \brief Copies exactly n (n > 0) elements from the range starting at first to |
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| 21 | /// the range starting at result. |
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| 22 | /// \return The updated output iterator |
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| 23 | /// |
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| 24 | /// \param first The start of the input sequence |
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| 25 | /// \param n The number of elements to copy |
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| 26 | /// \param result An output iterator to write the results into |
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| 27 | /// \note This function is part of the C++2011 standard library. |
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| 28 | template <typename InputIterator, typename Size, typename OutputIterator> |
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| 29 | BOOST_CXX14_CONSTEXPR OutputIterator copy_n ( InputIterator first, Size n, OutputIterator result ) |
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| 30 | { |
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| 31 | for ( ; n > 0; --n, ++first, ++result ) |
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| 32 | *result = *first; |
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| 33 | return result; |
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| 34 | } |
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| 35 | }} // namespace boost and algorithm |
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| 36 | |
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| 37 | #endif // BOOST_ALGORITHM_COPY_IF_HPP |
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| 38 | |
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