Boost.RangeEx merged into Boost.Range

[SVN r60897]

include/boost/range/adaptor/uniqued.hpp

@@ -0,0 +1,90 @@
+// Boost.Range library
+//
+//  Copyright Thorsten Ottosen, Neil Groves 2006 - 2008. Use, modification and
+//  distribution is subject to 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)
+//
+// For more information, see http://www.boost.org/libs/range/
+//
+
+#ifndef BOOST_RANGE_ADAPTOR_UNIQUED_IMPL_HPP
+#define BOOST_RANGE_ADAPTOR_UNIQUED_IMPL_HPP
+
+#include <boost/range/adaptor/adjacent_filtered.hpp>
+
+namespace boost
+{
+	
+	namespace range_detail
+	{
+		struct unique_forwarder { };
+		
+		struct unique_not_equal_to
+		{
+			typedef bool result_type;
+			
+			template< class T >
+			bool operator()( const T& l, const T& r ) const
+			{
+				return !(l == r);
+			}
+		};
+		
+		template<class ForwardRng>
+		class unique_range : public adjacent_filter_range<unique_not_equal_to, ForwardRng>
+		{
+			typedef adjacent_filter_range<unique_not_equal_to, ForwardRng> base;
+		public:
+		    explicit unique_range(ForwardRng& rng)
+		        : base(unique_not_equal_to(), rng, true)
+		    {
+		    }
+		};
+		
+		template< class ForwardRng >
+		inline unique_range<ForwardRng> 
+		operator|( ForwardRng& r, 
+				   unique_forwarder )
+		{
+			return unique_range<ForwardRng>(r);
+		}
+	
+		template< class ForwardRng >
+		inline unique_range<const ForwardRng> 
+		operator|( const ForwardRng& r, 
+				   unique_forwarder )
+		{
+			return unique_range<const ForwardRng>(r);
+		}
+		
+	} // 'range_detail'
+	
+	using range_detail::unique_range;
+	
+	namespace adaptors
+	{ 
+		namespace
+		{
+			const range_detail::unique_forwarder uniqued = 
+				       range_detail::unique_forwarder();
+		}
+		
+		template<class ForwardRange>
+		inline unique_range<ForwardRange>
+		unique(ForwardRange& rng)
+		{
+		    return unique_range<ForwardRange>(rng);
+	    }
+	    
+	    template<class ForwardRange>
+	    inline unique_range<const ForwardRange>
+	    unique(const ForwardRange& rng)
+	    {
+	        return unique_range<const ForwardRange>(rng);
+        }
+	} // 'adaptors'
+	
+}
+
+#endif