boost/algorithm/cxx11/partition_copy.hpp
/*
Copyright (c) Marshall Clow 2011-2012.
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
/// \file partition_copy.hpp
/// \brief Copy a subset of a sequence to a new sequence
/// \author Marshall Clow
#ifndef BOOST_ALGORITHM_PARTITION_COPY_HPP
#define BOOST_ALGORITHM_PARTITION_COPY_HPP
#include <utility> // for std::pair
#include <boost/config.hpp>
#include <boost/range/begin.hpp>
#include <boost/range/end.hpp>
namespace boost { namespace algorithm {
/// \fn partition_copy ( InputIterator first, InputIterator last,
/// OutputIterator1 out_true, OutputIterator2 out_false, UnaryPredicate p )
/// \brief Copies the elements that satisfy the predicate p from the range [first, last)
/// to the range beginning at d_first_true, and
/// copies the elements that do not satisfy p to the range beginning at d_first_false.
///
///
/// \param first The start of the input sequence
/// \param last One past the end of the input sequence
/// \param out_true An output iterator to write the elements that satisfy the predicate into
/// \param out_false An output iterator to write the elements that do not satisfy the predicate into
/// \param p A predicate for dividing the elements of the input sequence.
///
/// \note This function is part of the C++2011 standard library.
template <typename InputIterator,
typename OutputIterator1, typename OutputIterator2, typename UnaryPredicate>
BOOST_CXX14_CONSTEXPR std::pair<OutputIterator1, OutputIterator2>
partition_copy ( InputIterator first, InputIterator last,
OutputIterator1 out_true, OutputIterator2 out_false, UnaryPredicate p )
{
for ( ; first != last; ++first )
if ( p (*first))
*out_true++ = *first;
else
*out_false++ = *first;
return std::pair<OutputIterator1, OutputIterator2> ( out_true, out_false );
}
/// \fn partition_copy ( const Range &r,
/// OutputIterator1 out_true, OutputIterator2 out_false, UnaryPredicate p )
///
/// \param r The input range
/// \param out_true An output iterator to write the elements that satisfy the predicate into
/// \param out_false An output iterator to write the elements that do not satisfy the predicate into
/// \param p A predicate for dividing the elements of the input sequence.
///
template <typename Range, typename OutputIterator1, typename OutputIterator2,
typename UnaryPredicate>
BOOST_CXX14_CONSTEXPR std::pair<OutputIterator1, OutputIterator2>
partition_copy ( const Range &r, OutputIterator1 out_true, OutputIterator2 out_false,
UnaryPredicate p )
{
return boost::algorithm::partition_copy
(boost::begin(r), boost::end(r), out_true, out_false, p );
}
}} // namespace boost and algorithm
#endif // BOOST_ALGORITHM_PARTITION_COPY_HPP