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/*=============================================================================
Copyright (c) 2001-2011 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)
#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_source.hpp>
#include <boost/spirit/home/support/detail/hold_any.hpp>
#include <iosfwd>
#include <sstream>
///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit
{
///////////////////////////////////////////////////////////////////////////
// Enablers
///////////////////////////////////////////////////////////////////////////
template <>
struct use_terminal<qi::domain, tag::stream> // enables stream
: mpl::true_ {};
template <>
struct use_terminal<qi::domain, tag::wstream> // enables wstream
: mpl::true_ {};
}}
///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit { namespace qi
{
#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
using spirit::stream;
using spirit::wstream;
#endif
using spirit::stream_type;
using spirit::wstream_type;
template <typename Char = char, typename T = spirit::basic_hold_any<char> >
struct stream_parser
: primitive_parser<stream_parser<Char, T> >
{
template <typename Context, typename Iterator>
struct attribute
{
typedef T type;
};
template <typename Iterator, typename Context
, typename Skipper, typename Attribute>
bool parse(Iterator& first, Iterator const& last
, Context& /*context*/, Skipper const& skipper
, Attribute& attr) const
{
typedef qi::detail::iterator_source<Iterator> source_device;
typedef boost::iostreams::stream<source_device> instream;
qi::skip_over(first, last, skipper);
instream in(first, last); // copies 'first'
in >> attr; // use existing operator>>()
// advance the iterator if everything is ok
if (in.good()) {
std::streamsize pos = in.tellg();
std::advance(first, pos);
}
return in.good() || in.eof();
}
template <typename Context>
info what(Context& /*context*/) const
{
return info("stream");
}
};
template <typename T, typename Char = char>
struct typed_stream
: proto::terminal<stream_parser<Char, T> >::type
{
};
///////////////////////////////////////////////////////////////////////////
// Parser generators: make_xxx function (objects)
///////////////////////////////////////////////////////////////////////////
template <typename Char>
struct make_stream
{
typedef stream_parser<Char> result_type;
result_type operator()(unused_type, unused_type) const
{
return result_type();
}
};
template <typename Modifiers>
struct make_primitive<tag::stream, Modifiers> : make_stream<char> {};
template <typename Modifiers>
struct make_primitive<tag::wstream, Modifiers> : make_stream<wchar_t> {};
}}}
#endif
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