source: NonGTP/Boost/boost/spirit/meta/impl/fundamental.ipp @ 857

Revision 857, 10.5 KB checked in by igarcia, 19 years ago (diff)
RevLine 
[857]1/*=============================================================================
2    Copyright (c) 2002-2003 Hartmut Kaiser
3    http://spirit.sourceforge.net/
4
5    Use, modification and distribution is subject to the Boost Software
6    License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
7    http://www.boost.org/LICENSE_1_0.txt)
8=============================================================================*/
9#if !defined(BOOST_SPIRIT_FUNDAMENTAL_IPP)
10#define BOOST_SPIRIT_FUNDAMENTAL_IPP
11
12#include <boost/mpl/int.hpp>
13
14namespace boost { namespace spirit {
15
16#if defined(BOOST_MSVC) && (BOOST_MSVC <= 1300)
17    BOOST_SPIRIT_DEPENDENT_TEMPLATE_WRAPPER2(count_wrapper, count);
18#endif // defined(BOOST_MSVC) && (BOOST_MSVC <= 1300)
19
20namespace impl
21{
22    ///////////////////////////////////////////////////////////////////////////
23    //
24    //  Helper template for counting the number of nodes contained in a
25    //  given parser type.
26    //  All parser_category type parsers are counted as nodes.
27    //
28    ///////////////////////////////////////////////////////////////////////////
29    template <typename CategoryT>
30    struct nodes;
31
32    template <>
33    struct nodes<plain_parser_category> {
34
35        template <typename ParserT, typename LeafCountT>
36        struct count {
37
38            // __BORLANDC__ == 0x0561 isn't happy with BOOST_STATIC_CONSTANT
39            enum { value = (LeafCountT::value + 1) };
40        };
41    };
42
43#if defined(BOOST_MSVC) && (BOOST_MSVC <= 1300)
44
45    template <>
46    struct nodes<unary_parser_category> {
47
48        template <typename ParserT, typename LeafCountT>
49        struct count {
50
51            typedef typename ParserT::subject_t             subject_t;
52            typedef typename subject_t::parser_category_t   subject_category_t;
53
54            typedef nodes<subject_category_t> nodes_t;
55            typedef typename count_wrapper<nodes_t>
56                ::template result_<subject_t, LeafCountT>    count_t;
57
58            BOOST_STATIC_CONSTANT(int, value = count_t::value + 1);
59        };
60    };
61
62    template <>
63    struct nodes<action_parser_category> {
64
65        template <typename ParserT, typename LeafCountT>
66        struct count {
67
68            typedef typename ParserT::subject_t             subject_t;
69            typedef typename subject_t::parser_category_t   subject_category_t;
70
71            typedef nodes<subject_category_t> nodes_t;
72            typedef typename count_wrapper<nodes_t>
73                ::template result_<subject_t, LeafCountT>    count_t;
74
75            BOOST_STATIC_CONSTANT(int, value = count_t::value + 1);
76        };
77    };
78
79    template <>
80    struct nodes<binary_parser_category> {
81
82        template <typename ParserT, typename LeafCountT>
83        struct count {
84
85            typedef typename ParserT::left_t                left_t;
86            typedef typename ParserT::right_t               right_t;
87            typedef typename left_t::parser_category_t      left_category_t;
88            typedef typename right_t::parser_category_t     right_category_t;
89
90            typedef nodes<left_category_t> left_nodes_t;
91            typedef typename count_wrapper<left_nodes_t>
92                ::template result_<left_t, LeafCountT>       left_count_t;
93
94            typedef nodes<right_category_t> right_nodes_t;
95            typedef typename count_wrapper<right_nodes_t>
96                ::template result_<right_t, LeafCountT>      right_count_t;
97
98            BOOST_STATIC_CONSTANT(int,
99                value = (left_count_t::value + right_count_t::value + 1));
100        };
101    };
102
103#else
104
105    template <>
106    struct nodes<unary_parser_category> {
107
108        template <typename ParserT, typename LeafCountT>
109        struct count {
110
111            typedef typename ParserT::subject_t             subject_t;
112            typedef typename subject_t::parser_category_t   subject_category_t;
113
114            // __BORLANDC__ == 0x0561 isn't happy with BOOST_STATIC_CONSTANT
115            enum { value = (nodes<subject_category_t>
116                ::template count<subject_t, LeafCountT>::value + 1) };
117        };
118    };
119
120    template <>
121    struct nodes<action_parser_category> {
122
123        template <typename ParserT, typename LeafCountT>
124        struct count {
125
126            typedef typename ParserT::subject_t             subject_t;
127            typedef typename subject_t::parser_category_t   subject_category_t;
128
129            // __BORLANDC__ == 0x0561 isn't happy with BOOST_STATIC_CONSTANT
130            enum { value = (nodes<subject_category_t>
131                ::template count<subject_t, LeafCountT>::value + 1) };
132        };
133    };
134
135    template <>
136    struct nodes<binary_parser_category> {
137
138        template <typename ParserT, typename LeafCountT>
139        struct count {
140
141            typedef typename ParserT::left_t                left_t;
142            typedef typename ParserT::right_t               right_t;
143            typedef typename left_t::parser_category_t      left_category_t;
144            typedef typename right_t::parser_category_t     right_category_t;
145
146            typedef count self_t;
147
148            // __BORLANDC__ == 0x0561 isn't happy with BOOST_STATIC_CONSTANT
149            enum {
150                leftcount = (nodes<left_category_t>
151                    ::template count<left_t, LeafCountT>::value),
152                rightcount = (nodes<right_category_t>
153                    ::template count<right_t, LeafCountT>::value),
154                value = ((self_t::leftcount) + (self_t::rightcount) + 1)
155            };
156        };
157    };
158
159#endif
160
161    ///////////////////////////////////////////////////////////////////////////
162    //
163    //  Helper template for counting the number of leaf nodes contained in a
164    //  given parser type.
165    //  Only plain_parser_category type parsers are counted as leaf nodes.
166    //
167    ///////////////////////////////////////////////////////////////////////////
168    template <typename CategoryT>
169    struct leafs;
170
171    template <>
172    struct leafs<plain_parser_category> {
173
174        template <typename ParserT, typename LeafCountT>
175        struct count {
176
177            // __BORLANDC__ == 0x0561 isn't happy with BOOST_STATIC_CONSTANT
178            enum { value = (LeafCountT::value + 1) };
179        };
180    };
181
182#if defined(BOOST_MSVC) && (BOOST_MSVC <= 1300)
183
184    template <>
185    struct leafs<unary_parser_category> {
186
187        template <typename ParserT, typename LeafCountT>
188        struct count {
189
190            typedef typename ParserT::subject_t             subject_t;
191            typedef typename subject_t::parser_category_t   subject_category_t;
192
193            typedef leafs<subject_category_t> nodes_t;
194            typedef typename count_wrapper<nodes_t>
195                ::template result_<subject_t, LeafCountT>    count_t;
196
197            BOOST_STATIC_CONSTANT(int, value = count_t::value);
198        };
199    };
200
201    template <>
202    struct leafs<action_parser_category> {
203
204        template <typename ParserT, typename LeafCountT>
205        struct count {
206
207            typedef typename ParserT::subject_t             subject_t;
208            typedef typename subject_t::parser_category_t   subject_category_t;
209
210            typedef leafs<subject_category_t> nodes_t;
211            typedef typename count_wrapper<nodes_t>
212                ::template result_<subject_t, LeafCountT>    count_t;
213
214            BOOST_STATIC_CONSTANT(int, value = count_t::value);
215        };
216    };
217
218    template <>
219    struct leafs<binary_parser_category> {
220
221        template <typename ParserT, typename LeafCountT>
222        struct count {
223
224            typedef typename ParserT::left_t                left_t;
225            typedef typename ParserT::right_t               right_t;
226            typedef typename left_t::parser_category_t      left_category_t;
227            typedef typename right_t::parser_category_t     right_category_t;
228
229            typedef leafs<left_category_t> left_nodes_t;
230            typedef typename count_wrapper<left_nodes_t>
231                ::template result_<left_t, LeafCountT>       left_count_t;
232
233            typedef leafs<right_category_t> right_nodes_t;
234            typedef typename count_wrapper<right_nodes_t>
235                ::template result_<right_t, LeafCountT>      right_count_t;
236
237            BOOST_STATIC_CONSTANT(int,
238                value = (left_count_t::value + right_count_t::value));
239        };
240    };
241
242#else
243
244    template <>
245    struct leafs<unary_parser_category> {
246
247        template <typename ParserT, typename LeafCountT>
248        struct count {
249
250            typedef typename ParserT::subject_t             subject_t;
251            typedef typename subject_t::parser_category_t   subject_category_t;
252
253            // __BORLANDC__ == 0x0561 isn't happy with BOOST_STATIC_CONSTANT
254            enum { value = (leafs<subject_category_t>
255                ::template count<subject_t, LeafCountT>::value) };
256        };
257    };
258
259    template <>
260    struct leafs<action_parser_category> {
261
262        template <typename ParserT, typename LeafCountT>
263        struct count {
264
265            typedef typename ParserT::subject_t             subject_t;
266            typedef typename subject_t::parser_category_t   subject_category_t;
267
268            // __BORLANDC__ == 0x0561 isn't happy with BOOST_STATIC_CONSTANT
269            enum { value = (leafs<subject_category_t>
270                ::template count<subject_t, LeafCountT>::value) };
271        };
272    };
273
274    template <>
275    struct leafs<binary_parser_category> {
276
277        template <typename ParserT, typename LeafCountT>
278        struct count {
279
280            typedef typename ParserT::left_t                left_t;
281            typedef typename ParserT::right_t               right_t;
282            typedef typename left_t::parser_category_t      left_category_t;
283            typedef typename right_t::parser_category_t     right_category_t;
284
285            typedef count self_t;
286
287            // __BORLANDC__ == 0x0561 isn't happy with BOOST_STATIC_CONSTANT
288            enum {
289                leftcount = (leafs<left_category_t>
290                    ::template count<left_t, LeafCountT>::value),
291                rightcount = (leafs<right_category_t>
292                    ::template count<right_t, LeafCountT>::value),
293                value = (self_t::leftcount + self_t::rightcount)
294            };
295        };
296    };
297
298#endif
299
300}   // namespace impl
301
302///////////////////////////////////////////////////////////////////////////////
303}} // namespace boost::spirit
304
305#endif // !defined(BOOST_SPIRIT_FUNDAMENTAL_IPP)
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