source: NonGTP/Boost/boost/wave/grammars/cpp_grammar_gen.hpp @ 857

Revision 857, 4.6 KB checked in by igarcia, 19 years ago (diff)
Line 
1/*=============================================================================
2    Boost.Wave: A Standard compliant C++ preprocessor library
3
4    http://www.boost.org/
5
6    Copyright (c) 2001-2005 Hartmut Kaiser. Distributed under the Boost
7    Software License, Version 1.0. (See accompanying file
8    LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9=============================================================================*/
10
11#if !defined(CPP_GRAMMAR_GEN_HPP_80CB8A59_5411_4E45_B406_62531A12FB99_INCLUDED)
12#define CPP_GRAMMAR_GEN_HPP_80CB8A59_5411_4E45_B406_62531A12FB99_INCLUDED
13
14#include <boost/spirit/tree/parse_tree.hpp>
15
16#include <boost/wave/wave_config.hpp>
17#include <boost/wave/language_support.hpp>
18
19///////////////////////////////////////////////////////////////////////////////
20namespace boost {
21namespace wave {
22namespace grammars {
23
24///////////////////////////////////////////////////////////////////////////////
25// 
26//  store parser_id's of all rules of the cpp_grammar here for later access
27//
28///////////////////////////////////////////////////////////////////////////////
29struct cpp_grammar_rule_ids {
30    std::size_t pp_statement_id;
31    std::size_t include_file_id;       // #include "..."
32    std::size_t sysinclude_file_id;    // #include <...>
33    std::size_t macroinclude_file_id;  // #include ...
34    std::size_t plain_define_id;       // #define
35    std::size_t macro_parameters_id;
36    std::size_t macro_definition_id;
37    std::size_t undefine_id;           // #undef
38    std::size_t ifdef_id;              // #ifdef
39    std::size_t ifndef_id;             // #ifndef
40    std::size_t if_id;                 // #if
41    std::size_t elif_id;               // #elif
42    std::size_t else_id;               // #else
43    std::size_t endif_id;              // #endif
44    std::size_t line_id;               // #line
45    std::size_t error_id;              // #error
46    std::size_t warning_id;            // #warning
47    std::size_t pragma_id;             // #pragma
48    std::size_t illformed_id;
49    std::size_t ppspace_id;
50    std::size_t ppqualifiedname_id;
51#if BOOST_WAVE_SUPPORT_MS_EXTENSIONS != 0
52    std::size_t region_id;             // #region
53    std::size_t endregion_id;          // #endregion
54#endif
55};
56
57///////////////////////////////////////////////////////////////////////////////
58// 
59//  cpp_grammar_gen template class
60//
61//      This template helps separating the compilation of the cpp_grammar
62//      class from the compilation of the main pp_iterator. This is done to
63//      safe compilation time.
64//
65///////////////////////////////////////////////////////////////////////////////
66
67template <typename LexIteratorT>
68struct cpp_grammar_gen
69{
70    typedef LexIteratorT                          iterator_type;
71    typedef typename LexIteratorT::token_type     token_type;
72    typedef typename token_type::position_type    position_type;
73   
74//  the parser_id's of all rules of the cpp_grammar are stored here
75//  note: these are valid only after the first call to parse_cpp_grammar
76    static cpp_grammar_rule_ids rule_ids;
77
78//  the actual position of the last matched T_NEWLINE is stored here into the
79//  member 'pos_of_newline'
80    static position_type pos_of_newline;
81
82//  the found_eof flag is set to true during the parsing, if the directive
83//  under inspection terminates with a T__EOF token
84    static bool found_eof;
85
86//  the found_directive contains the token_id of the recognized pp directive
87    static boost::wave::token_id found_directive;
88       
89//  parse the cpp_grammar and return the resulting parse tree   
90    static boost::spirit::tree_parse_info<iterator_type>
91    parse_cpp_grammar (iterator_type const &first, iterator_type const &last,
92        bool &found_eof_, position_type const &act_pos);
93};
94
95///////////////////////////////////////////////////////////////////////////////
96//  definitions of the static members
97template <typename LexIteratorT>
98cpp_grammar_rule_ids
99    cpp_grammar_gen<LexIteratorT>::rule_ids;
100
101template <typename LexIteratorT>
102typename LexIteratorT::token_type::position_type
103    cpp_grammar_gen<LexIteratorT>::pos_of_newline;
104
105template <typename LexIteratorT>
106bool cpp_grammar_gen<LexIteratorT>::found_eof = false;
107
108template <typename LexIteratorT>
109boost::wave::token_id cpp_grammar_gen<LexIteratorT>::found_directive =
110    boost::wave::T_EOF;
111
112///////////////////////////////////////////////////////////////////////////////
113}   // namespace grammars
114}   // namespace wave
115}   // namespace boost
116
117#endif // !defined(CPP_GRAMMAR_GEN_HPP_80CB8A59_5411_4E45_B406_62531A12FB99_INCLUDED)
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