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