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90 lines
2.3 KiB
90 lines
2.3 KiB
// Boost.Range library |
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// |
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// Copyright Thorsten Ottosen, Neil Groves 2006 - 2008. 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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// For more information, see http://www.boost.org/libs/range/ |
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// |
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#ifndef BOOST_RANGE_ADAPTOR_UNIQUED_IMPL_HPP |
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#define BOOST_RANGE_ADAPTOR_UNIQUED_IMPL_HPP |
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#include <boost/range/adaptor/adjacent_filtered.hpp> |
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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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struct unique_forwarder { }; |
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struct unique_not_equal_to |
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{ |
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typedef bool result_type; |
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template< class T > |
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bool operator()( const T& l, const T& r ) const |
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{ |
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return !(l == r); |
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} |
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}; |
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template<class ForwardRng> |
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class uniqued_range : public adjacent_filtered_range<unique_not_equal_to, ForwardRng, true> |
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{ |
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typedef adjacent_filtered_range<unique_not_equal_to, ForwardRng, true> base; |
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public: |
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explicit uniqued_range(ForwardRng& rng) |
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: base(unique_not_equal_to(), rng) |
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{ |
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} |
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}; |
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template< class ForwardRng > |
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inline uniqued_range<ForwardRng> |
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operator|( ForwardRng& r, |
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unique_forwarder ) |
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{ |
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return uniqued_range<ForwardRng>(r); |
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} |
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template< class ForwardRng > |
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inline uniqued_range<const ForwardRng> |
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operator|( const ForwardRng& r, |
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unique_forwarder ) |
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{ |
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return uniqued_range<const ForwardRng>(r); |
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} |
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} // 'range_detail' |
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using range_detail::uniqued_range; |
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namespace adaptors |
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{ |
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namespace |
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{ |
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const range_detail::unique_forwarder uniqued = |
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range_detail::unique_forwarder(); |
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} |
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template<class ForwardRange> |
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inline uniqued_range<ForwardRange> |
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unique(ForwardRange& rng) |
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{ |
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return uniqued_range<ForwardRange>(rng); |
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} |
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template<class ForwardRange> |
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inline uniqued_range<const ForwardRange> |
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unique(const ForwardRange& rng) |
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{ |
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return uniqued_range<const ForwardRange>(rng); |
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} |
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} // 'adaptors' |
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} |
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#endif
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