text: // Boost.Range library
  //
  //  Copyright Neil Groves 2010. 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_DEFINE_ADAPTOR_HPP_INCLUDED
  #define BOOST_RANGE_DEFINE_ADAPTOR_HPP_INCLUDED
  
  #include <boost/tuple/tuple.hpp>
  
  #define BOOST_DEFINE_RANGE_ADAPTOR( adaptor_name, range_adaptor ) \
      struct adaptor_name##_forwarder {}; \
      \
      template<typename Range> range_adaptor <Range> \
          operator|(Range& rng, adaptor_name##_forwarder) \
      { \
          return range_adaptor <Range>( rng ); \
      } \
      \
      template<typename Range> range_adaptor <const Range> \
          operator|(const Range& rng, adaptor_name##_forwarder) \
      { \
          return range_adaptor <const Range>( rng ); \
      } \
      \
      static adaptor_name##_forwarder adaptor_name = adaptor_name##_forwarder(); \
      \
      template<typename Range> \
      range_adaptor <Range> \
      make_##adaptor_name(Range& rng) \
      { \
          return range_adaptor <Range>(rng); \
      } \
      \
      template<typename Range> \
      range_adaptor <const Range> \
      make_##adaptor_name(const Range& rng) \
      { \
          return range_adaptor <const Range>(rng); \
      }
  
  #define BOOST_DEFINE_RANGE_ADAPTOR_1( adaptor_name, range_adaptor, arg1_type ) \
      struct adaptor_name \
      { \
          explicit adaptor_name (arg1_type arg1_) \
              : arg1(arg1_) {} \
          arg1_type arg1; \
      }; \
      \
      template<typename Range> range_adaptor <Range> \
          operator|(Range& rng, adaptor_name args) \
      { \
          return range_adaptor <Range>(rng, args.arg1); \
      } \
      \
      template<typename Range> range_adaptor <const Range> \
          operator|(const Range& rng, adaptor_name args) \
      { \
          return range_adaptor <const Range>(rng, args.arg1); \
      } \
      \
      template<typename Range> \
      range_adaptor <Range> \
      make_##adaptor_name(Range& rng, arg1_type arg1) \
      { \
          return range_adaptor <Range>(rng, arg1); \
      } \
      \
      template<typename Range> \
      range_adaptor <const Range> \
      make_##adaptor_name(const Range& rng, arg1_type arg1) \
      { \
          return range_adaptor <const Range>(rng, arg1); \
      }
  
  #define BOOST_RANGE_ADAPTOR_2( adaptor_name, range_adaptor, arg1_type, arg2_type ) \
      struct adaptor_name \
      { \
          explicit adaptor_name (arg1_type arg1_, arg2_type arg2_) \
              : arg1(arg1_), arg2(arg2_) {} \
          arg1_type arg1; \
          arg2_type arg2; \
      }; \
      \
      template<typename Range> range_adaptor <Range> \
      operator|(Range& rng, adaptor_name args) \
      { \
          return range_adaptor <Range>(rng, args.arg1, args.arg2); \
      } \
      template<typename Range> \
      range_adaptor <Range> \
      make_##adaptor_name(Range& rng, arg1_type arg1, arg2_type arg2) \
      { \
          return range_adaptor <Range>(rng, arg1, arg2); \
      } \
      template<typename Range> \
      range_adaptor <const Range> \
      make_##adaptor_name(const Range& rng, arg1_type arg1, arg2_type arg2) \
      { \
          return range_adaptor <const Range>(rng, arg1, arg2); \
      }
  
  
  #endif // include guard
  