40 lines
1.1 KiB
C++
Executable File
40 lines
1.1 KiB
C++
Executable File
/*
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Copyright (c) Marshall Clow 2017.
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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/// \file for_each_n.hpp
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/// \brief Apply a functor to the elements of a sequence
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/// \author Marshall Clow
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#ifndef BOOST_ALGORITHM_FOR_EACH_N_HPP
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#define BOOST_ALGORITHM_FOR_EACH_N_HPP
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#include <utility> // for std::pair
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#include <boost/config.hpp>
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namespace boost { namespace algorithm {
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/// \fn for_each_n(InputIterator first, Size n, Function f);
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/// \return first + n
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///
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/// \param first The start of the first range.
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/// \param n One past the end of the first range.
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/// \param f A functor to apply to the elements of the sequence
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/// \note If f returns a result, the result is ignored.
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template<class InputIterator, class Size, class Function>
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InputIterator for_each_n(InputIterator first, Size n, Function f)
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{
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for ( ; n > 0; --n, ++first )
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f(*first);
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return first;
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}
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}} // namespace boost and algorithm
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#endif // BOOST_ALGORITHM_FOR_EACH_N_HPP
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