180 lines
6.8 KiB
C++
180 lines
6.8 KiB
C++
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/*=============================================================================
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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) 2001-2012 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(BOOST_CPP_PREDEF_MACROS_GRAMMAR_HPP_53858C9A_C202_4D60_AD92_DC9CAE4DBB43_INCLUDED)
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#define BOOST_CPP_PREDEF_MACROS_GRAMMAR_HPP_53858C9A_C202_4D60_AD92_DC9CAE4DBB43_INCLUDED
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#include <boost/spirit/include/classic_core.hpp>
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#include <boost/spirit/include/classic_parse_tree.hpp>
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#include <boost/spirit/include/classic_confix.hpp>
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#include <boost/spirit/include/classic_lists.hpp>
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#include <boost/wave/wave_config.hpp>
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#include <boost/wave/token_ids.hpp>
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#include <boost/wave/grammars/cpp_predef_macros_gen.hpp>
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#include <boost/wave/util/pattern_parser.hpp>
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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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namespace boost {
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namespace wave {
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namespace grammars {
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///////////////////////////////////////////////////////////////////////////////
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// define, whether the rule's should generate some debug output
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#define TRACE_PREDEF_MACROS_GRAMMAR \
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bool(BOOST_SPIRIT_DEBUG_FLAGS_CPP & BOOST_SPIRIT_DEBUG_FLAGS_PREDEF_MACROS_GRAMMAR) \
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/**/
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///////////////////////////////////////////////////////////////////////////////
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// Encapsulation of the grammar for command line driven predefined macros.
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struct predefined_macros_grammar :
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public boost::spirit::classic::grammar<predefined_macros_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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// 'normal' (parse_tree generating) rule type
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typedef boost::spirit::classic::rule<
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ScannerT, boost::spirit::classic::dynamic_parser_tag>
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rule_type;
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rule_type plain_define, macro_definition, macro_parameters;
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definition(predefined_macros_grammar const &/*self*/)
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{
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// import the spirit and cpplexer namespaces here
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using namespace boost::spirit::classic;
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using namespace boost::wave;
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using namespace boost::wave::util;
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// set the rule id's for later use
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plain_define.set_id(BOOST_WAVE_PLAIN_DEFINE_ID);
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macro_parameters.set_id(BOOST_WAVE_MACRO_PARAMETERS_ID);
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macro_definition.set_id(BOOST_WAVE_MACRO_DEFINITION_ID);
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// recognizes command line defined macro syntax, i.e.
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// -DMACRO
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// -DMACRO=
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// -DMACRO=value
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// -DMACRO(x)
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// -DMACRO(x)=
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// -DMACRO(x)=value
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// This grammar resembles the overall structure of the cpp_grammar to
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// make it possible to reuse the parse tree traversal code
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plain_define
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= ( ch_p(T_IDENTIFIER)
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| pattern_p(KeywordTokenType,
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TokenTypeMask|PPTokenFlag)
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| pattern_p(OperatorTokenType|AltExtTokenType,
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ExtTokenTypeMask|PPTokenFlag) // and, bit_and etc.
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| pattern_p(BoolLiteralTokenType,
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TokenTypeMask|PPTokenFlag) // true/false
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)
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>> !macro_parameters
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>> !macro_definition
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;
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// parameter list
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macro_parameters
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= confix_p(
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no_node_d[ch_p(T_LEFTPAREN) >> *ch_p(T_SPACE)],
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!list_p(
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( ch_p(T_IDENTIFIER)
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| pattern_p(KeywordTokenType,
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TokenTypeMask|PPTokenFlag)
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| pattern_p(OperatorTokenType|AltExtTokenType,
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ExtTokenTypeMask|PPTokenFlag) // and, bit_and etc.
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| pattern_p(BoolLiteralTokenType,
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TokenTypeMask|PPTokenFlag) // true/false
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#if BOOST_WAVE_SUPPORT_VARIADICS_PLACEMARKERS != 0
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| ch_p(T_ELLIPSIS)
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#endif
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),
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no_node_d
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[
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*ch_p(T_SPACE) >> ch_p(T_COMMA) >> *ch_p(T_SPACE)
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]
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),
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no_node_d[*ch_p(T_SPACE) >> ch_p(T_RIGHTPAREN)]
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)
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;
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// macro body (anything left until eol)
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macro_definition
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= no_node_d[ch_p(T_ASSIGN)]
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>> *anychar_p
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;
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BOOST_SPIRIT_DEBUG_TRACE_RULE(plain_define, TRACE_PREDEF_MACROS_GRAMMAR);
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BOOST_SPIRIT_DEBUG_TRACE_RULE(macro_definition, TRACE_PREDEF_MACROS_GRAMMAR);
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BOOST_SPIRIT_DEBUG_TRACE_RULE(macro_parameters, TRACE_PREDEF_MACROS_GRAMMAR);
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}
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// start rule of this grammar
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rule_type const& start() const
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{ return plain_define; }
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};
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predefined_macros_grammar()
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{
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BOOST_SPIRIT_DEBUG_TRACE_GRAMMAR_NAME(*this,
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"predefined_macros_grammar", TRACE_PREDEF_MACROS_GRAMMAR);
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}
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};
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///////////////////////////////////////////////////////////////////////////////
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#undef TRACE_PREDEF_MACROS_GRAMMAR
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///////////////////////////////////////////////////////////////////////////////
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//
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// The following parse function is defined here, to allow the separation of
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// the compilation of the cpp_predefined_macros_grammar from the function
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// 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_PREDEF_MACROS_GRAMMAR_GEN_INLINE
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#else
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#define BOOST_WAVE_PREDEF_MACROS_GRAMMAR_GEN_INLINE inline
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#endif
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template <typename LexIteratorT>
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BOOST_WAVE_PREDEF_MACROS_GRAMMAR_GEN_INLINE
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boost::spirit::classic::tree_parse_info<LexIteratorT>
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predefined_macros_grammar_gen<LexIteratorT>::parse_predefined_macro (
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LexIteratorT const &first, LexIteratorT const &last)
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{
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predefined_macros_grammar g;
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return boost::spirit::classic::pt_parse (first, last, g);
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}
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#undef BOOST_WAVE_PREDEF_MACROS_GRAMMAR_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(BOOST_CPP_PREDEF_MACROS_GRAMMAR_HPP_53858C9A_C202_4D60_AD92_DC9CAE4DBB43_INCLUDED)
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