Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Hartmut Kaiser
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined(BOOST_SPIRIT_STREAM_MAY_05_2007_1228PM)
Chris@16: #define BOOST_SPIRIT_STREAM_MAY_05_2007_1228PM
Chris@16: 
Chris@16: #if defined(_MSC_VER)
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/spirit/home/qi/detail/string_parse.hpp>
Chris@16: #include <boost/spirit/home/qi/stream/detail/match_manip.hpp>
Chris@16: #include <boost/spirit/home/qi/stream/detail/iterator_source.hpp>
Chris@16: #include <boost/spirit/home/support/detail/hold_any.hpp>
Chris@16: 
Chris@16: #include <iosfwd>
Chris@16: #include <sstream>
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: namespace boost { namespace spirit
Chris@16: {
Chris@16:     ///////////////////////////////////////////////////////////////////////////
Chris@16:     // Enablers
Chris@16:     ///////////////////////////////////////////////////////////////////////////
Chris@16:     template <>
Chris@16:     struct use_terminal<qi::domain, tag::stream> // enables stream
Chris@16:       : mpl::true_ {};
Chris@16: 
Chris@16:     template <>
Chris@16:     struct use_terminal<qi::domain, tag::wstream> // enables wstream
Chris@16:       : mpl::true_ {};
Chris@16: }}
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: namespace boost { namespace spirit { namespace qi
Chris@16: {
Chris@16: #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
Chris@16:     using spirit::stream;
Chris@16:     using spirit::wstream;
Chris@16: #endif
Chris@16:     using spirit::stream_type;
Chris@16:     using spirit::wstream_type;
Chris@16: 
Chris@16:     template <typename Char = char, typename T = spirit::basic_hold_any<char> >
Chris@16:     struct stream_parser
Chris@16:       : primitive_parser<stream_parser<Char, T> >
Chris@16:     {
Chris@16:         template <typename Context, typename Iterator>
Chris@16:         struct attribute
Chris@16:         {
Chris@16:             typedef T type;
Chris@16:         };
Chris@16: 
Chris@16:         template <typename Iterator, typename Context
Chris@16:           , typename Skipper, typename Attribute>
Chris@16:         bool parse(Iterator& first, Iterator const& last
Chris@16:           , Context& /*context*/, Skipper const& skipper
Chris@16:           , Attribute& attr_) const
Chris@16:         {
Chris@16:             typedef qi::detail::iterator_source<Iterator> source_device;
Chris@16:             typedef boost::iostreams::stream<source_device> instream;
Chris@16: 
Chris@16:             qi::skip_over(first, last, skipper);
Chris@16: 
Chris@16:             instream in(first, last);           // copies 'first'
Chris@16:             in >> attr_;                        // use existing operator>>()
Chris@16: 
Chris@16:             // advance the iterator if everything is ok
Chris@16:             if (in) {
Chris@101:                 if (!in.eof()) {
Chris@101:                     std::streamsize pos = in.tellg();
Chris@101:                     std::advance(first, pos);
Chris@101:                 } else {
Chris@101:                     first = last;
Chris@101:                 }
Chris@16:                 return true;
Chris@16:             }
Chris@16: 
Chris@16:             return false;
Chris@16:         }
Chris@16: 
Chris@16:         template <typename Context>
Chris@16:         info what(Context& /*context*/) const
Chris@16:         {
Chris@16:             return info("stream");
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     template <typename T, typename Char = char>
Chris@16:     struct typed_stream
Chris@16:       : proto::terminal<stream_parser<Char, T> >::type
Chris@16:     {
Chris@16:     };
Chris@16: 
Chris@16:     ///////////////////////////////////////////////////////////////////////////
Chris@16:     // Parser generators: make_xxx function (objects)
Chris@16:     ///////////////////////////////////////////////////////////////////////////
Chris@16:     template <typename Char>
Chris@16:     struct make_stream
Chris@16:     {
Chris@16:         typedef stream_parser<Char> result_type;
Chris@16:         result_type operator()(unused_type, unused_type) const
Chris@16:         {
Chris@16:             return result_type();
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     template <typename Modifiers>
Chris@16:     struct make_primitive<tag::stream, Modifiers> : make_stream<char> {};
Chris@16: 
Chris@16:     template <typename Modifiers>
Chris@16:     struct make_primitive<tag::wstream, Modifiers> : make_stream<wchar_t> {};
Chris@16: }}}
Chris@16: 
Chris@16: #endif