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188 lines
6.5 KiB
188 lines
6.5 KiB
/*============================================================================= |
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Boost.Wave: A Standard compliant C++ preprocessor library |
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http://www.boost.org/ |
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Copyright (c) 2001-2011 Hartmut Kaiser. Distributed under the Boost |
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Software License, Version 1.0. (See accompanying file |
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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(CPP_INTLIT_GRAMMAR_HPP_2E1E70B1_F15C_4132_8554_10A231B0D91C_INCLUDED) |
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#define CPP_INTLIT_GRAMMAR_HPP_2E1E70B1_F15C_4132_8554_10A231B0D91C_INCLUDED |
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#include <boost/wave/wave_config.hpp> |
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#include <boost/spirit/include/classic_core.hpp> |
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#include <boost/spirit/include/classic_closure.hpp> |
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#include <boost/spirit/include/classic_assign_actor.hpp> |
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#include <boost/spirit/include/classic_push_back_actor.hpp> |
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#include <boost/spirit/include/phoenix1_operators.hpp> |
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#include <boost/spirit/include/phoenix1_primitives.hpp> |
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#include <boost/spirit/include/phoenix1_statements.hpp> |
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#include <boost/wave/cpp_exceptions.hpp> |
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#include <boost/wave/grammars/cpp_literal_grammar_gen.hpp> |
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#if !defined(spirit_append_actor) |
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#define spirit_append_actor(actor) boost::spirit::classic::push_back_a(actor) |
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#define spirit_assign_actor(actor) boost::spirit::classic::assign_a(actor) |
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#endif // !defined(spirit_append_actor) |
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// this must occur after all of the includes and before any code appears |
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#ifdef BOOST_HAS_ABI_HEADERS |
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#include BOOST_ABI_PREFIX |
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#endif |
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/////////////////////////////////////////////////////////////////////////////// |
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// |
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// Reusable grammar for parsing of C++ style integer literals |
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// |
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/////////////////////////////////////////////////////////////////////////////// |
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namespace boost { |
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namespace wave { |
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namespace grammars { |
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/////////////////////////////////////////////////////////////////////////////// |
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namespace closures { |
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struct intlit_closure |
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: boost::spirit::classic::closure<intlit_closure, uint_literal_type> |
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{ |
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member1 val; |
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}; |
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} |
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/////////////////////////////////////////////////////////////////////////////// |
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// define, whether the rule's should generate some debug output |
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#define TRACE_INTLIT_GRAMMAR \ |
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bool(BOOST_SPIRIT_DEBUG_FLAGS_CPP & BOOST_SPIRIT_DEBUG_FLAGS_INTLIT_GRAMMAR) \ |
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/**/ |
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struct intlit_grammar : |
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boost::spirit::classic::grammar<intlit_grammar, closures::intlit_closure::context_t> |
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{ |
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intlit_grammar(bool &is_unsigned_) : is_unsigned(is_unsigned_) |
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{ |
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BOOST_SPIRIT_DEBUG_TRACE_GRAMMAR_NAME(*this, "intlit_grammar", |
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TRACE_INTLIT_GRAMMAR); |
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} |
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template <typename ScannerT> |
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struct definition |
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{ |
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typedef boost::spirit::classic::rule<ScannerT> rule_t; |
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rule_t int_lit; |
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boost::spirit::classic::subrule<0> sub_int_lit; |
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boost::spirit::classic::subrule<1> oct_lit; |
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boost::spirit::classic::subrule<2> hex_lit; |
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boost::spirit::classic::subrule<3> dec_lit; |
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definition(intlit_grammar const &self) |
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{ |
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using namespace boost::spirit::classic; |
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namespace phx = phoenix; |
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int_lit = ( |
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sub_int_lit = |
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( ch_p('0')[self.val = 0] >> (hex_lit | oct_lit) |
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| dec_lit |
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) |
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>> !as_lower_d[ |
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(ch_p('u')[phx::var(self.is_unsigned) = true] || ch_p('l')) |
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| (ch_p('l') || ch_p('u')[phx::var(self.is_unsigned) = true]) |
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] |
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, |
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hex_lit = |
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(ch_p('X') | ch_p('x')) |
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>> uint_parser<uint_literal_type, 16>() |
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[ |
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self.val = phx::arg1, |
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phx::var(self.is_unsigned) = true |
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] |
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, |
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oct_lit = |
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!uint_parser<uint_literal_type, 8>() |
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[ |
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self.val = phx::arg1, |
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phx::var(self.is_unsigned) = true |
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] |
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, |
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dec_lit = |
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uint_parser<uint_literal_type, 10>() |
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[ |
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self.val = phx::arg1 |
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] |
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) |
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; |
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BOOST_SPIRIT_DEBUG_TRACE_RULE(int_lit, TRACE_INTLIT_GRAMMAR); |
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BOOST_SPIRIT_DEBUG_TRACE_RULE(sub_int_lit, TRACE_INTLIT_GRAMMAR); |
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BOOST_SPIRIT_DEBUG_TRACE_RULE(hex_lit, TRACE_INTLIT_GRAMMAR); |
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BOOST_SPIRIT_DEBUG_TRACE_RULE(oct_lit, TRACE_INTLIT_GRAMMAR); |
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BOOST_SPIRIT_DEBUG_TRACE_RULE(dec_lit, TRACE_INTLIT_GRAMMAR); |
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} |
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// start rule of this grammar |
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rule_t const& start() const |
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{ return int_lit; } |
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}; |
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bool &is_unsigned; |
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}; |
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#undef TRACE_INTLIT_GRAMMAR |
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/////////////////////////////////////////////////////////////////////////////// |
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// |
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// The following function is defined here, to allow the separation of |
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// the compilation of the intlit_grammar from the function using it. |
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// |
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/////////////////////////////////////////////////////////////////////////////// |
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#if BOOST_WAVE_SEPARATE_GRAMMAR_INSTANTIATION != 0 |
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#define BOOST_WAVE_INTLITGRAMMAR_GEN_INLINE |
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#else |
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#define BOOST_WAVE_INTLITGRAMMAR_GEN_INLINE inline |
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#endif |
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template <typename TokenT> |
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BOOST_WAVE_INTLITGRAMMAR_GEN_INLINE |
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uint_literal_type |
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intlit_grammar_gen<TokenT>::evaluate(TokenT const &token, |
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bool &is_unsigned) |
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{ |
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using namespace boost::spirit::classic; |
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intlit_grammar g(is_unsigned); |
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uint_literal_type result = 0; |
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typename TokenT::string_type const &token_val = token.get_value(); |
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parse_info<typename TokenT::string_type::const_iterator> hit = |
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parse(token_val.begin(), token_val.end(), g[spirit_assign_actor(result)]); |
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if (!hit.hit) { |
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BOOST_WAVE_THROW(preprocess_exception, ill_formed_integer_literal, |
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token_val.c_str(), token.get_position()); |
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} |
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return result; |
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} |
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#undef BOOST_WAVE_INTLITGRAMMAR_GEN_INLINE |
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/////////////////////////////////////////////////////////////////////////////// |
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} // namespace grammars |
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} // namespace wave |
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} // namespace boost |
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// the suffix header occurs after all of the code |
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#ifdef BOOST_HAS_ABI_HEADERS |
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#include BOOST_ABI_SUFFIX |
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#endif |
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#endif // !defined(CPP_INTLIT_GRAMMAR_HPP_2E1E70B1_F15C_4132_8554_10A231B0D91C_INCLUDED)
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