forked from boostorg/algorithm
72 lines
2.9 KiB
C++
72 lines
2.9 KiB
C++
/*
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Copyright (c) Marshall Clow 2011-2012.
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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 partition_copy.hpp
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/// \brief Copy a subset of a sequence to a new sequence
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/// \author Marshall Clow
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#ifndef BOOST_ALGORITHM_PARTITION_COPY_HPP
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#define BOOST_ALGORITHM_PARTITION_COPY_HPP
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#include <utility> // for std::pair
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#include <boost/config.hpp>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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namespace boost { namespace algorithm {
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/// \fn partition_copy ( InputIterator first, InputIterator last,
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/// OutputIterator1 out_true, OutputIterator2 out_false, UnaryPredicate p )
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/// \brief Copies the elements that satisfy the predicate p from the range [first, last)
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/// to the range beginning at d_first_true, and
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/// copies the elements that do not satisfy p to the range beginning at d_first_false.
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///
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///
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/// \param first The start of the input sequence
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/// \param last One past the end of the input sequence
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/// \param out_true An output iterator to write the elements that satisfy the predicate into
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/// \param out_false An output iterator to write the elements that do not satisfy the predicate into
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/// \param p A predicate for dividing the elements of the input sequence.
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///
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/// \note This function is part of the C++2011 standard library.
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template <typename InputIterator,
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typename OutputIterator1, typename OutputIterator2, typename UnaryPredicate>
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BOOST_CXX14_CONSTEXPR std::pair<OutputIterator1, OutputIterator2>
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partition_copy ( InputIterator first, InputIterator last,
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OutputIterator1 out_true, OutputIterator2 out_false, UnaryPredicate p )
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{
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for ( ; first != last; ++first )
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if ( p (*first))
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*out_true++ = *first;
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else
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*out_false++ = *first;
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return std::pair<OutputIterator1, OutputIterator2> ( out_true, out_false );
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}
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/// \fn partition_copy ( const Range &r,
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/// OutputIterator1 out_true, OutputIterator2 out_false, UnaryPredicate p )
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///
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/// \param r The input range
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/// \param out_true An output iterator to write the elements that satisfy the predicate into
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/// \param out_false An output iterator to write the elements that do not satisfy the predicate into
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/// \param p A predicate for dividing the elements of the input sequence.
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///
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template <typename Range, typename OutputIterator1, typename OutputIterator2,
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typename UnaryPredicate>
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BOOST_CXX14_CONSTEXPR std::pair<OutputIterator1, OutputIterator2>
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partition_copy ( const Range &r, OutputIterator1 out_true, OutputIterator2 out_false,
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UnaryPredicate p )
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{
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return boost::algorithm::partition_copy
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(boost::begin(r), boost::end(r), out_true, out_false, p );
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}
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}} // namespace boost and algorithm
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#endif // BOOST_ALGORITHM_PARTITION_COPY_HPP
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