1 | /*=============================================================================
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2 | Copyright (c) 2001-2003 Joel de Guzman
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3 | Copyright (c) 2002-2003 Martin Wille
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4 | Copyright (c) 2003 Hartmut Kaiser
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5 | http://spirit.sourceforge.net/
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6 |
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7 | Use, modification and distribution is subject to the Boost Software
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8 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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9 | http://www.boost.org/LICENSE_1_0.txt)
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10 | =============================================================================*/
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11 | #if !defined(BOOST_SPIRIT_GRAMMAR_HPP)
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12 | #define BOOST_SPIRIT_GRAMMAR_HPP
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13 |
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14 | ///////////////////////////////////////////////////////////////////////////////
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15 | #if defined(BOOST_SPIRIT_THREADSAFE) && defined(BOOST_SPIRIT_SINGLE_GRAMMAR_INSTANCE)
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16 | #undef BOOST_SPIRIT_SINGLE_GRAMMAR_INSTANCE
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17 | #endif
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18 |
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19 | #include <boost/spirit/core/parser.hpp>
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20 | #include <boost/spirit/core/non_terminal/parser_context.hpp>
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21 | #include <boost/spirit/core/non_terminal/impl/grammar.ipp>
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22 |
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23 | ///////////////////////////////////////////////////////////////////////////////
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24 | namespace boost { namespace spirit {
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25 |
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26 | ///////////////////////////////////////////////////////////////////////////////
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27 | //
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28 | // grammar class
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29 | //
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30 | ///////////////////////////////////////////////////////////////////////////////
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31 | template <typename DerivedT, typename ContextT = parser_context<> >
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32 | struct grammar
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33 | : public parser<DerivedT>
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34 | , public ContextT::base_t
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35 | , public context_aux<ContextT, DerivedT>
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36 | BOOST_SPIRIT_GRAMMAR_ID
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37 | {
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38 | typedef grammar<DerivedT, ContextT> self_t;
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39 | typedef DerivedT const& embed_t;
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40 | typedef typename ContextT::context_linker_t context_t;
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41 | typedef typename context_t::attr_t attr_t;
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42 |
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43 | template <typename ScannerT>
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44 | struct result
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45 | {
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46 | typedef typename match_result<ScannerT, attr_t>::type type;
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47 | };
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48 |
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49 | grammar() {}
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50 | ~grammar() { impl::grammar_destruct(this); }
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51 |
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52 | template <typename ScannerT>
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53 | typename parser_result<self_t, ScannerT>::type
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54 | parse_main(ScannerT const& scan) const
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55 | { return impl::grammar_parser_parse<0>(this, scan); }
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56 |
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57 | template <typename ScannerT>
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58 | typename parser_result<self_t, ScannerT>::type
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59 | parse(ScannerT const& scan) const
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60 | {
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61 | typedef typename parser_result<self_t, ScannerT>::type result_t;
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62 | typedef parser_scanner_linker<ScannerT> scanner_t;
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63 | BOOST_SPIRIT_CONTEXT_PARSE(scan, *this, scanner_t, context_t, result_t)
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64 | }
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65 |
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66 | template <int N>
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67 | impl::entry_grammar<DerivedT, N, ContextT>
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68 | use_parser() const
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69 | { return impl::entry_grammar<DerivedT, N, ContextT>( this->derived()); }
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70 |
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71 | BOOST_SPIRIT_GRAMMAR_STATE
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72 | };
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73 |
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74 | ///////////////////////////////////////////////////////////////////////////////
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75 | }} // namespace boost::spirit
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76 |
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77 | #undef BOOST_SPIRIT_GRAMMAR_ID
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78 | #undef BOOST_SPIRIT_GRAMMAR_ACCESS
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79 | #undef BOOST_SPIRIT_GRAMMAR_STATE
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80 | #endif
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81 |
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