forked from boostorg/range
95 lines
2.2 KiB
C++
95 lines
2.2 KiB
C++
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// Boost.Range library
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//
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// Copyright Neil Groves 2014.
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 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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// For more information, see http://www.boost.org/libs/range/
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//
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#ifndef BOOST_RANGE_SEPARATED_HPP_INCLUDED
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#define BOOST_RANGE_SEPARATED_HPP_INCLUDED
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#include <boost/config.hpp>
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#include <boost/range/concepts.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/iterator.hpp>
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#include <ostream>
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namespace boost
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{
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namespace range_detail
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{
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template<typename Iter, typename Separator>
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class output_stream_writer
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{
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public:
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output_stream_writer(Iter first, Iter last, Separator separator)
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: m_first(first)
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, m_last(last)
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, m_separator(separator)
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{
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}
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template<typename OStream>
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void write(OStream& out) const
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{
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write_impl(out, m_first, m_last, m_separator);
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}
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private:
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template<typename OStream>
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static void write_impl(
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OStream& out, Iter first, Iter last, Separator separator)
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{
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if (first != last)
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{
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out << *first;
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for (++first; first != last; ++first)
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{
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out << separator << *first;
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}
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}
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}
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Iter m_first;
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Iter m_last;
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Separator m_separator;
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};
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template<typename Char, typename Traits, typename Iter, typename Separator>
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std::basic_ostream<Char, Traits>&
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operator<<(
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std::basic_ostream<Char, Traits>& out,
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const output_stream_writer<Iter, Separator>& writer)
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{
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writer.write(out);
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return out;
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}
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} // namespace range_detail
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namespace range
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{
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template<typename Range, typename Separator>
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inline range_detail::output_stream_writer<
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typename range_iterator<const Range>::type,
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Separator
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>
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separated(const Range& rng, Separator separator)
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{
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BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<const Range>));
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return range_detail::output_stream_writer<
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typename range_iterator<const Range>::type,
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Separator
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>(boost::begin(rng), boost::end(rng), separator);
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}
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} // namespace range
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} // namespace boost
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#endif // include guard
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