text: //  Copyright (c) 2001-2008 Hartmut Kaiser
  //
  //  Distributed under 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)
  
  #if !defined(BOOST_SPIRIT_STREAM_MAY_05_2007_1228PM)
  #define BOOST_SPIRIT_STREAM_MAY_05_2007_1228PM
  
  #if defined(_MSC_VER) && (_MSC_VER >= 1020)
  #pragma once      // MS compatible compilers support #pragma once
  #endif
  
  #include <boost/spirit/home/qi/detail/string_parse.hpp>
  #include <boost/spirit/home/qi/stream/detail/match_manip.hpp>
  #include <boost/spirit/home/qi/stream/detail/iterator_istream.hpp>
  #include <boost/spirit/home/support/detail/hold_any.hpp>
  
  #include <iosfwd>
  #include <sstream>
  
  ///////////////////////////////////////////////////////////////////////////////
  namespace boost { namespace spirit
  {
      // overload the streaming operators for the unused_type
      template <typename Char, typename Traits>
      inline std::basic_istream<Char, Traits>&
      operator>> (std::basic_istream<Char, Traits>& is, unused_type&)
      {
          return is;
      }
  }}
  
  ///////////////////////////////////////////////////////////////////////////////
  namespace boost { namespace spirit { namespace qi
  {
      template <typename Char, typename T = spirit::hold_any>
      struct any_stream
      {
          template <typename Component, typename Context, typename Iterator>
          struct attribute
          {
              typedef T type;
          };
  
          template <
              typename Component
            , typename Iterator, typename Context
            , typename Skipper, typename Attribute>
          static bool parse(
              Component const& /*component*/
            , Iterator& first, Iterator const& last
            , Context& /*context*/, Skipper const& skipper
            , Attribute& attr)
          {
              typedef qi::detail::iterator_source<Iterator> source_device;
              typedef boost::iostreams::stream<source_device> instream;
  
              qi::skip(first, last, skipper);
              instream in (first, last);
              in >> attr;                       // use existing operator>>()
              return in.good() || in.eof();
          }
  
          template <typename Component, typename Context>
          static std::string what(Component const& component, Context const& ctx)
          {
              return "any-stream";
          }
      };
  
  }}}
  
  #endif
  