[857] | 1 | /*=============================================================================
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| 2 | Boost.Wave: A Standard compliant C++ preprocessor library
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| 3 |
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| 4 | http://www.boost.org/
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| 5 |
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| 6 | Copyright (c) 2001-2005 Hartmut Kaiser. Distributed under the Boost
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| 7 | Software License, Version 1.0. (See accompanying file
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| 8 | LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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| 9 | =============================================================================*/
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| 10 |
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| 11 | #if !defined(CPP_PREDEF_MACROS_GRAMMAR_HPP_53858C9A_C202_4D60_AD92_DC9CAE4DBB43_INCLUDED)
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| 12 | #define CPP_PREDEF_MACROS_GRAMMAR_HPP_53858C9A_C202_4D60_AD92_DC9CAE4DBB43_INCLUDED
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| 13 |
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| 14 | #include <boost/spirit/core.hpp>
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| 15 | #include <boost/spirit/tree/parse_tree.hpp>
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| 16 | #include <boost/spirit/utility/confix.hpp>
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| 17 | #include <boost/spirit/utility/lists.hpp>
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| 18 |
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| 19 | #include <boost/wave/wave_config.hpp>
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| 20 | #include <boost/wave/token_ids.hpp>
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| 21 | #include <boost/wave/grammars/cpp_predef_macros_gen.hpp>
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| 22 | #include <boost/wave/util/pattern_parser.hpp>
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| 23 |
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| 24 | ///////////////////////////////////////////////////////////////////////////////
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| 25 | namespace boost {
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| 26 | namespace wave {
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| 27 | namespace grammars {
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| 28 |
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| 29 | ///////////////////////////////////////////////////////////////////////////////
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| 30 | // define, whether the rule's should generate some debug output
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| 31 | #define TRACE_PREDEF_MACROS_GRAMMAR \
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| 32 | bool(BOOST_SPIRIT_DEBUG_FLAGS_CPP & BOOST_SPIRIT_DEBUG_FLAGS_PREDEF_MACROS_GRAMMAR) \
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| 33 | /**/
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| 34 |
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| 35 | ///////////////////////////////////////////////////////////////////////////////
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| 36 | // Encapsulation of the grammar for command line driven predefined macros.
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| 37 | struct predefined_macros_grammar :
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| 38 | public boost::spirit::grammar<predefined_macros_grammar>
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| 39 | {
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| 40 | template <typename ScannerT>
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| 41 | struct definition
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| 42 | {
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| 43 | // 'normal' (parse_tree generating) rule type
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| 44 | typedef boost::spirit::rule<ScannerT> rule_t;
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| 45 |
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| 46 | rule_t plain_define, macro_definition, macro_parameters;
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| 47 |
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| 48 | definition(predefined_macros_grammar const &self)
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| 49 | {
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| 50 | // import the spirit and cpplexer namespaces here
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| 51 | using namespace boost::spirit;
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| 52 | using namespace boost::wave;
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| 53 | using namespace boost::wave::util;
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| 54 |
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| 55 | // save the rule id's for later use
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| 56 | self.rule_ids.plain_define_id = plain_define.id().to_long();
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| 57 | self.rule_ids.macro_parameters_id = macro_parameters.id().to_long();
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| 58 | self.rule_ids.macro_definition_id = macro_definition.id().to_long();
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| 59 |
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| 60 | // recognizes command line defined macro syntax, i.e.
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| 61 | // -DMACRO
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| 62 | // -DMACRO=
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| 63 | // -DMACRO=value
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| 64 | // -DMACRO(x)
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| 65 | // -DMACRO(x)=
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| 66 | // -DMACRO(x)=value
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| 67 |
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| 68 | // This grammar resembles the overall structure of the cpp_grammar to
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| 69 | // make it possible to reuse the parse tree traversal code
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| 70 | plain_define
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| 71 | = ( ch_p(T_IDENTIFIER)
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| 72 | | pattern_p(KeywordTokenType, TokenTypeMask)
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| 73 | | pattern_p(OperatorTokenType|AltExtTokenType,
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| 74 | ExtTokenTypeMask) // and, bit_and etc.
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| 75 | )
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| 76 | >> !macro_parameters
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| 77 | >> !macro_definition
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| 78 | ;
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| 79 |
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| 80 | // parameter list
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| 81 | macro_parameters
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| 82 | = confix_p(
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| 83 | no_node_d[ch_p(T_LEFTPAREN) >> *ch_p(T_SPACE)],
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| 84 | !list_p(
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| 85 | ( ch_p(T_IDENTIFIER)
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| 86 | | pattern_p(KeywordTokenType, TokenTypeMask)
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| 87 | | pattern_p(OperatorTokenType|AltExtTokenType,
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| 88 | ExtTokenTypeMask) // and, bit_and etc.
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| 89 | #if BOOST_WAVE_SUPPORT_VARIADICS_PLACEMARKERS != 0
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| 90 | | ch_p(T_ELLIPSIS)
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| 91 | #endif
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| 92 | ),
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| 93 | no_node_d
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| 94 | [
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| 95 | *ch_p(T_SPACE) >> ch_p(T_COMMA) >> *ch_p(T_SPACE)
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| 96 | ]
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| 97 | ),
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| 98 | no_node_d[*ch_p(T_SPACE) >> ch_p(T_RIGHTPAREN)]
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| 99 | )
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| 100 | ;
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| 101 |
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| 102 | // macro body (anything left until eol)
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| 103 | macro_definition
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| 104 | = no_node_d[ch_p(T_ASSIGN)]
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| 105 | >> *anychar_p
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| 106 | ;
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| 107 |
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| 108 | BOOST_SPIRIT_DEBUG_TRACE_RULE(plain_define, TRACE_PREDEF_MACROS_GRAMMAR);
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| 109 | BOOST_SPIRIT_DEBUG_TRACE_RULE(macro_definition, TRACE_PREDEF_MACROS_GRAMMAR);
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| 110 | BOOST_SPIRIT_DEBUG_TRACE_RULE(macro_parameters, TRACE_PREDEF_MACROS_GRAMMAR);
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| 111 | }
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| 112 |
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| 113 | // start rule of this grammar
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| 114 | rule_t const& start() const
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| 115 | { return plain_define; }
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| 116 | };
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| 117 |
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| 118 | predefined_macros_grammar_rule_ids &rule_ids;
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| 119 |
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| 120 | predefined_macros_grammar(predefined_macros_grammar_rule_ids &rule_ids_)
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| 121 | : rule_ids(rule_ids_)
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| 122 | {
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| 123 | BOOST_SPIRIT_DEBUG_TRACE_GRAMMAR_NAME(*this,
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| 124 | "predefined_macros_grammar", TRACE_PREDEF_MACROS_GRAMMAR);
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| 125 | }
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| 126 |
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| 127 | };
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| 128 |
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| 129 | ///////////////////////////////////////////////////////////////////////////////
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| 130 | #undef TRACE_PREDEF_MACROS_GRAMMAR
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| 131 |
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| 132 | ///////////////////////////////////////////////////////////////////////////////
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| 133 | //
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| 134 | // The following parse function is defined here, to allow the separation of
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| 135 | // the compilation of the cpp_predefined_macros_grammar from the function
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| 136 | // using it.
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| 137 | //
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| 138 | ///////////////////////////////////////////////////////////////////////////////
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| 139 |
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| 140 | #if BOOST_WAVE_SEPARATE_GRAMMAR_INSTANTIATION != 0
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| 141 | #define BOOST_WAVE_PREDEF_MACROS_GRAMMAR_GEN_INLINE
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| 142 | #else
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| 143 | #define BOOST_WAVE_PREDEF_MACROS_GRAMMAR_GEN_INLINE inline
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| 144 | #endif
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| 145 |
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| 146 | template <typename LexIteratorT>
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| 147 | BOOST_WAVE_PREDEF_MACROS_GRAMMAR_GEN_INLINE
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| 148 | boost::spirit::tree_parse_info<LexIteratorT>
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| 149 | predefined_macros_grammar_gen<LexIteratorT>::parse_predefined_macro (
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| 150 | LexIteratorT const &first, LexIteratorT const &last)
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| 151 | {
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| 152 | predefined_macros_grammar g(rule_ids);
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| 153 | return boost::spirit::pt_parse (first, last, g);
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| 154 | }
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| 155 |
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| 156 | #undef BOOST_WAVE_PREDEF_MACROS_GRAMMAR_GEN_INLINE
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| 157 |
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| 158 | ///////////////////////////////////////////////////////////////////////////////
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| 159 | } // namespace grammars
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| 160 | } // namespace wave
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| 161 | } // namespace boost
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| 162 |
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| 163 | #endif // !defined(CPP_PREDEF_MACROS_GRAMMAR_HPP_53858C9A_C202_4D60_AD92_DC9CAE4DBB43_INCLUDED)
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