[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_INTLIT_GRAMMAR_HPP_2E1E70B1_F15C_4132_8554_10A231B0D91C_INCLUDED)
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| 12 | #define CPP_INTLIT_GRAMMAR_HPP_2E1E70B1_F15C_4132_8554_10A231B0D91C_INCLUDED
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| 13 |
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| 14 | #include <boost/spirit/core.hpp>
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| 15 | #include <boost/spirit/attribute/closure.hpp>
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| 16 | #if SPIRIT_VERSION >= 0x1700
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| 17 | #include <boost/spirit/actor/assign_actor.hpp>
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| 18 | #include <boost/spirit/actor/push_back_actor.hpp>
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| 19 | #endif // SPIRIT_VERSION >= 0x1700
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| 20 |
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| 21 | #include <boost/spirit/phoenix/operators.hpp>
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| 22 | #include <boost/spirit/phoenix/primitives.hpp>
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| 23 | #include <boost/spirit/phoenix/statements.hpp>
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| 24 |
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| 25 | #include <boost/wave/wave_config.hpp>
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| 26 | #include <boost/wave/cpp_exceptions.hpp>
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| 27 | #include <boost/wave/grammars/cpp_literal_grammar_gen.hpp>
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| 28 |
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| 29 | #if !defined(spirit_append_actor)
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| 30 | #if SPIRIT_VERSION >= 0x1700
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| 31 | #define spirit_append_actor(actor) boost::spirit::push_back_a(actor)
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| 32 | #define spirit_assign_actor(actor) boost::spirit::assign_a(actor)
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| 33 | #else
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| 34 | #define spirit_append_actor(actor) boost::spirit::append(actor)
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| 35 | #define spirit_assign_actor(actor) boost::spirit::assign(actor)
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| 36 | #endif // SPIRIT_VERSION >= 0x1700
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| 37 | #endif // !defined(spirit_append_actor)
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| 38 |
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| 39 | ///////////////////////////////////////////////////////////////////////////////
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| 40 | //
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| 41 | // Reusable grammar for parsing of C++ style integer literals
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| 42 | //
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| 43 | ///////////////////////////////////////////////////////////////////////////////
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| 44 | namespace boost {
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| 45 | namespace wave {
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| 46 | namespace grammars {
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| 47 |
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| 48 | namespace closures {
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| 49 |
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| 50 | struct intlit_closure
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| 51 | : boost::spirit::closure<intlit_closure, unsigned long>
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| 52 | {
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| 53 | member1 val;
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| 54 | };
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| 55 | }
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| 56 |
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| 57 | ///////////////////////////////////////////////////////////////////////////////
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| 58 | // define, whether the rule's should generate some debug output
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| 59 | #define TRACE_INTLIT_GRAMMAR \
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| 60 | bool(BOOST_SPIRIT_DEBUG_FLAGS_CPP & BOOST_SPIRIT_DEBUG_FLAGS_INTLIT_GRAMMAR) \
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| 61 | /**/
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| 62 |
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| 63 | struct intlit_grammar :
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| 64 | boost::spirit::grammar<intlit_grammar, closures::intlit_closure::context_t>
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| 65 | {
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| 66 | intlit_grammar(bool &is_unsigned_) : is_unsigned(is_unsigned_)
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| 67 | {
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| 68 | BOOST_SPIRIT_DEBUG_TRACE_GRAMMAR_NAME(*this, "intlit_grammar",
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| 69 | TRACE_INTLIT_GRAMMAR);
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| 70 | }
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| 71 |
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| 72 | template <typename ScannerT>
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| 73 | struct definition
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| 74 | {
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| 75 | typedef boost::spirit::rule<ScannerT> rule_t;
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| 76 |
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| 77 | rule_t int_lit;
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| 78 | boost::spirit::subrule<0> sub_int_lit;
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| 79 | boost::spirit::subrule<1> oct_lit;
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| 80 | boost::spirit::subrule<2> hex_lit;
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| 81 | boost::spirit::subrule<3> dec_lit;
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| 82 |
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| 83 | definition(intlit_grammar const &self)
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| 84 | {
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| 85 | using namespace boost::spirit;
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| 86 | using namespace phoenix;
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| 87 |
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| 88 | int_lit = (
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| 89 | sub_int_lit =
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| 90 | ( ch_p('0')[self.val = 0] >> (hex_lit | oct_lit)
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| 91 | | dec_lit
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| 92 | )
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| 93 | >> !as_lower_d[
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| 94 | (ch_p('u')[var(self.is_unsigned) = true] || ch_p('l'))
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| 95 | | (ch_p('l') || ch_p('u')[var(self.is_unsigned) = true])
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| 96 | ]
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| 97 | ,
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| 98 |
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| 99 | hex_lit =
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| 100 | (ch_p('X') | ch_p('x'))
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| 101 | >> uint_parser<unsigned long, 16>()
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| 102 | [
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| 103 | self.val = arg1,
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| 104 | var(self.is_unsigned) = true
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| 105 | ]
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| 106 | ,
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| 107 |
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| 108 | oct_lit =
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| 109 | !uint_parser<unsigned long, 8>()
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| 110 | [
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| 111 | self.val = arg1,
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| 112 | var(self.is_unsigned) = true
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| 113 | ]
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| 114 | ,
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| 115 |
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| 116 | dec_lit =
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| 117 | int_parser<long, 10>()
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| 118 | [
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| 119 | self.val = arg1
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| 120 | ]
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| 121 | )
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| 122 | ;
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| 123 |
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| 124 | BOOST_SPIRIT_DEBUG_TRACE_RULE(int_lit, TRACE_INTLIT_GRAMMAR);
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| 125 | BOOST_SPIRIT_DEBUG_TRACE_RULE(sub_int_lit, TRACE_INTLIT_GRAMMAR);
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| 126 | BOOST_SPIRIT_DEBUG_TRACE_RULE(hex_lit, TRACE_INTLIT_GRAMMAR);
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| 127 | BOOST_SPIRIT_DEBUG_TRACE_RULE(oct_lit, TRACE_INTLIT_GRAMMAR);
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| 128 | BOOST_SPIRIT_DEBUG_TRACE_RULE(dec_lit, TRACE_INTLIT_GRAMMAR);
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| 129 | }
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| 130 |
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| 131 | // start rule of this grammar
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| 132 | rule_t const& start() const
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| 133 | { return int_lit; }
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| 134 | };
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| 135 |
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| 136 | bool &is_unsigned;
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| 137 | };
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| 138 |
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| 139 | #undef TRACE_INTLIT_GRAMMAR
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| 140 |
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| 141 | ///////////////////////////////////////////////////////////////////////////////
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| 142 | //
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| 143 | // The following function is defined here, to allow the separation of
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| 144 | // the compilation of the intlit_grammar from the function using it.
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| 145 | //
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| 146 | ///////////////////////////////////////////////////////////////////////////////
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| 147 |
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| 148 | #if BOOST_WAVE_SEPARATE_GRAMMAR_INSTANTIATION != 0
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| 149 | #define BOOST_WAVE_INTLITGRAMMAR_GEN_INLINE
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| 150 | #else
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| 151 | #define BOOST_WAVE_INTLITGRAMMAR_GEN_INLINE inline
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| 152 | #endif
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| 153 |
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| 154 | template <typename TokenT>
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| 155 | BOOST_WAVE_INTLITGRAMMAR_GEN_INLINE
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| 156 | unsigned long
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| 157 | intlit_grammar_gen<TokenT>::evaluate(TokenT const &token,
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| 158 | bool &is_unsigned)
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| 159 | {
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| 160 | using namespace boost::spirit;
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| 161 |
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| 162 | intlit_grammar g(is_unsigned);
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| 163 | unsigned long result = 0;
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| 164 | typename TokenT::string_type const &token_val = token.get_value();
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| 165 | parse_info<typename TokenT::string_type::const_iterator> hit =
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| 166 | parse(token_val.begin(), token_val.end(), g[spirit_assign_actor(result)]);
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| 167 |
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| 168 | if (!hit.hit) {
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| 169 | BOOST_WAVE_THROW(preprocess_exception, ill_formed_integer_literal,
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| 170 | token_val.c_str(), token.get_position());
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| 171 | }
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| 172 | return result;
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| 173 | }
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| 174 |
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| 175 | #undef BOOST_WAVE_INTLITGRAMMAR_GEN_INLINE
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| 176 |
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| 177 | ///////////////////////////////////////////////////////////////////////////////
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| 178 | } // namespace grammars
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| 179 | } // namespace wave
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| 180 | } // namespace boost
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| 181 |
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| 182 | #endif // !defined(CPP_INTLIT_GRAMMAR_HPP_2E1E70B1_F15C_4132_8554_10A231B0D91C_INCLUDED)
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