111 lines
3.8 KiB
Plaintext
111 lines
3.8 KiB
Plaintext
// Copyright Neil Groves 2009. Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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//
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// For more information, see http://www.boost.org/libs/range/
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//
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#ifndef BOOST_RANGE_ALGORITHM_FOR_EACH_HPP_INCLUDED
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#define BOOST_RANGE_ALGORITHM_FOR_EACH_HPP_INCLUDED
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#include <boost/concept_check.hpp>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/range/concepts.hpp>
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#include <boost/utility/enable_if.hpp>
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#include <boost/ref.hpp>
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#include <algorithm>
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#if BOOST_WORKAROUND(BOOST_MSVC, == 1600)
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#include <xutility>
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#endif
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namespace boost
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{
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namespace range
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{
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#if BOOST_WORKAROUND(BOOST_MSVC, == 1600)
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namespace for_each_detail
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{
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template<typename Iterator, typename UnaryFunction>
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inline UnaryFunction
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for_each_impl(Iterator first, Iterator last, UnaryFunction fun,
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typename ::boost::enable_if<
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is_reference_wrapper<UnaryFunction>,
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void
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>::type* = 0)
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{
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typedef typename std::_Get_unchecked_type<Iterator>::type
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unchecked_iterator;
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unchecked_iterator unchecked_last = std::_Unchecked(last);
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for (unchecked_iterator unchecked_first = std::_Unchecked(first); first != last; ++first)
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fun.get()(*unchecked_first);
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return fun;
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}
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template<typename Iterator, typename UnaryFunction>
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inline UnaryFunction
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for_each_impl(Iterator first, Iterator last, UnaryFunction fn,
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typename disable_if<
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is_reference_wrapper<UnaryFunction>,
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void
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>::type* = 0)
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{
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return std::for_each<Iterator, UnaryFunction>(first, last, fn);
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}
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}
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#endif
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/// \brief template function for_each
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///
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/// range-based version of the for_each std algorithm
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///
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/// \pre SinglePassRange is a model of the SinglePassRangeConcept
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/// \pre UnaryFunction is a model of the UnaryFunctionConcept
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template< class SinglePassRange, class UnaryFunction >
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inline UnaryFunction for_each(SinglePassRange & rng, UnaryFunction fun)
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{
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BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> ));
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#if BOOST_WORKAROUND(BOOST_MSVC, == 1600)
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return for_each_detail::for_each_impl<
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typename range_iterator<SinglePassRange>::type,
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UnaryFunction
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>(boost::begin(rng), boost::end(rng), fun);
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#else
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return std::for_each<
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BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type,
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UnaryFunction
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>(boost::begin(rng),boost::end(rng),fun);
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#endif
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}
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/// \overload
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template< class SinglePassRange, class UnaryFunction >
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inline UnaryFunction for_each(const SinglePassRange& rng, UnaryFunction fun)
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{
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BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> ));
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#if BOOST_WORKAROUND(BOOST_MSVC, == 1600)
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return for_each_detail::for_each_impl<
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typename range_iterator<const SinglePassRange>::type,
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UnaryFunction
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>(boost::begin(rng), boost::end(rng), fun);
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#else
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return std::for_each<
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BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange>::type,
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UnaryFunction
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>(boost::begin(rng), boost::end(rng), fun);
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#endif
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}
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} // namespace range
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using range::for_each;
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} // namespace boost
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#endif // include guard
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