4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Stefan Bund <g0dil@berlios.de>
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 \brief VariantParser internal header */
26 #ifndef IH_VariantParser_
27 #define IH_VariantParser_ 1
30 #include "PacketParser.hh"
31 #include <boost/preprocessor/cat.hpp>
32 #include <boost/preprocessor/seq/enum.hpp>
33 #include <boost/preprocessor/seq/fold_left.hpp>
34 #include <boost/preprocessor/seq/for_each.hpp>
35 #include <boost/preprocessor/logical/or.hpp>
36 #include <boost/preprocessor/seq/for_each_i.hpp>
38 ///////////////////////////////ih.p////////////////////////////////////////
45 template <class Variant, unsigned N>
47 static PacketParserBase::size_type bytes(Variant const & v, unsigned n);
50 template <class Variant>
51 struct VariantBytes<Variant,0> {
52 static PacketParserBase::size_type bytes(Variant const & v, unsigned n);
55 template <class Transform, class AuxPolicy, class AuxTag>
56 struct VariantParserPolicy;
58 template <class AuxPolicy, class AuxTag>
59 struct VariantParserPolicy<void, AuxPolicy, AuxTag>
62 template <class Transform, class AuxPolicy, class AuxTag>
63 struct VariantParserPolicy
64 : public VariantParserPolicy< void,
65 TransformAuxParserPolicy<AuxPolicy, Transform>, AuxTag >
68 template <class AuxPolicy>
69 struct VariantParserPolicy<void, AuxPolicy, senf::detail::auxtag::none>
71 typedef AuxPolicy type;
74 template <class AuxPolicy, class Transform>
75 struct VariantParserPolicy<void,
77 senf::detail::auxtag::transform<Transform,
78 senf::detail::auxtag::none> >
80 typedef TransformAuxParserPolicy<AuxPolicy, Transform> type;
83 template <class Parsers, class Transform>
84 struct VariantParserTraits
86 template <class AuxPolicy, class AuxTag>
88 typedef senf::VariantParser<
89 typename VariantParserPolicy<Transform, AuxPolicy, AuxTag>::type,
94 template <class T, T (*KeyFn)()>
97 static T key() { return (*KeyFn)(); }
100 template <class T, class Keys>
101 struct VariantKeyTransform
103 typedef unsigned value_type;
104 typedef T input_type;
105 static unsigned get(input_type v);
106 static input_type set(unsigned v);
109 template <class In, class Out, class Keys, unsigned N>
110 struct VariantKeyTransformCheck
112 static Out get(In v);
113 static In set(Out v);
116 template <class In, class Out, class Keys>
117 struct VariantKeyTransformCheck<In, Out, Keys, 0>
119 static Out get(In v);
120 static In set(Out v);
123 # define SENF_PARSER_VARIANT_I(access, name, chooser, types) \
124 SENF_PARSER_REQUIRE_VAR(variant) \
126 typedef boost::mpl::vector< BOOST_PP_SEQ_ENUM(SENF_PARSER_VARIANT_TYPES(types)) > \
127 BOOST_PP_CAT(name, _parsers); \
128 typedef BOOST_PP_CAT(SENF_PARSER_COLLECTION_GETAUX(chooser), _t)::value_type \
129 BOOST_PP_CAT(name,_chooser_value_type); \
130 BOOST_PP_IF( SENF_PARSER_VARIANT_NEEDTRANSFORM(types), \
131 SENF_PARSER_VARIANT_MAKETRANSFORM, \
132 SENF_PARSER_VARIANT_NOTRANSFORM )(name, \
134 typedef senf::detail::VariantParserTraits< BOOST_PP_CAT(name, _parsers), \
135 BOOST_PP_CAT(name, _transform) > \
136 BOOST_PP_CAT(name, _traits); \
138 SENF_PARSER_COLLECTION_I( \
139 access, name, chooser, BOOST_PP_CAT(name, _traits) ); \
140 BOOST_PP_SEQ_FOR_EACH_I(SENF_PARSER_VARIANT_ACCESSOR, name, types)
142 # define SENF_PARSER_VARIANT_MAKETRANSFORM(name, types) \
143 BOOST_PP_SEQ_FOR_EACH_I(SENF_PARSER_VARIANT_KEYVALUE, name, types) \
144 template <BOOST_PP_CAT(name, _chooser_value_type) (*KeyFn)()> \
145 struct BOOST_PP_CAT(name, _key_value_template) \
146 : public senf::detail::VariantKey<BOOST_PP_CAT(name, _chooser_value_type), KeyFn> {}; \
147 template <class T, T (*K)()> friend class senf::detail::VariantKey; \
148 typedef senf::detail::VariantKeyTransform< \
149 BOOST_PP_CAT(name,_chooser_value_type), \
150 boost::mpl::vector< \
151 BOOST_PP_SEQ_ENUM(SENF_PARSER_VARIANT_KEYVALUES(name, types)) \
152 > > BOOST_PP_CAT(name, _transform);
154 # define SENF_PARSER_VARIANT_KEYVALUE(r, name, i, elem) \
155 static BOOST_PP_CAT(name, _chooser_value_type) \
156 BOOST_PP_CAT(BOOST_PP_CAT(name, _key_),i)() \
157 { return SENF_PARSER_VARIANT_GETKEY(elem, i); }
159 # define SENF_PARSER_VARIANT_NOTRANSFORM(name, types) \
160 typedef void BOOST_PP_CAT(name, _transform);
162 # define SENF_PARSER_VARIANT_KEYVALUES(name, types) \
163 BOOST_PP_SEQ_FOR_EACH_I(SENF_PARSER_VARIANT_KEYVALUES_, name, types)
165 # define SENF_PARSER_VARIANT_KEYVALUES_(r, name, i, elem) \
166 (BOOST_PP_CAT(name,_key_value_template)< \
167 & BOOST_PP_CAT(BOOST_PP_CAT(name, _key_), i) >)
169 # define SENF_PARSER_VARIANT_ACCESSOR(r, name, i, elem) \
170 BOOST_PP_IF( SENF_PARSER_VARIANT_HASID(elem), \
171 SENF_PARSER_VARIANT_MAKEACCESSOR, \
172 SENF_PARSER_VARIANT_NOACCESSOR )(name, i, elem)
174 # define SENF_PARSER_VARIANT_NOACCESSOR(name, i, elem)
175 # define SENF_PARSER_VARIANT_MAKEACCESSOR(name, i, elem) \
176 BOOST_PP_IF( SENF_PARSER_VARIANT_HASVALUE(elem), \
177 SENF_PARSER_VARIANT_MAKEVACCESSOR, \
178 SENF_PARSER_VARIANT_MAKENVACCESSOR )(name, i, elem)
180 # define SENF_PARSER_VARIANT_MAKEVACCESSOR(name, i, elem) \
181 typedef SENF_PARSER_VARIANT_GETTYPE(elem) \
182 BOOST_PP_CAT(SENF_PARSER_VARIANT_GETID(elem), _t); \
183 SENF_PARSER_VARIANT_GETTYPE(elem) SENF_PARSER_VARIANT_GETID(elem)() const \
184 { return name().get<i>(); } \
185 void BOOST_PP_CAT(init_, SENF_PARSER_VARIANT_GETID(elem))() const \
186 { name().init<i>(); } \
187 bool BOOST_PP_CAT(has_, SENF_PARSER_VARIANT_GETID(elem))() const \
188 { return name().variant() == i; }
190 # define SENF_PARSER_VARIANT_MAKENVACCESSOR(name, i, elem) \
191 void SENF_PARSER_VARIANT_GETID(elem)() const \
192 { name().init<i>(); }
194 # define SENF_PARSER_VARIANT_KEY_GOBBLE__key(key, type)
195 # define SENF_PARSER_VARIANT_KEY_GETKEY__key(key, type) key
196 # define SENF_PARSER_VARIANT_KEY_GETTYPE__key(key, type) type
198 # define SENF_PARSER_VARIANT_ID_GOBBLE__id(id, value)
199 # define SENF_PARSER_VARIANT_ID_GETID__id(id, value) id
200 # define SENF_PARSER_VARIANT_ID_GETVALUE__id(id, value) value
202 # define SENF_PARSER_VARIANT_ID_GOBBLE__novalue(id, value)
203 # define SENF_PARSER_VARIANT_ID_GETID__novalue(id, value) id
204 # define SENF_PARSER_VARIANT_ID_GETVALUE__novalue(id, value) value
206 # define SENF_PARSER_VARIANT_HASVALUE_GOBBLE__id(id, value)
208 # define SENF_PARSER_VARIANT_HASKEY(x) \
209 SENF_PARSER_VARIANT_HASKEY_( SENF_PARSER_VARIANT_GETVALUE(x) )
211 # define SENF_PARSER_VARIANT_HASKEY_(x) \
212 BOOST_PP_IS_EMPTY( SENF_CAT_RECURS1(SENF_PARSER_VARIANT_KEY_GOBBLE__, x) )
214 # define SENF_PARSER_VARIANT_GETKEY(x, default) \
215 SENF_PARSER_VARIANT_GETKEY_( SENF_PARSER_VARIANT_GETVALUE(x), default )
217 # define SENF_PARSER_VARIANT_GETKEY_(x, default) \
218 BOOST_PP_IF( SENF_PARSER_VARIANT_HASKEY_(x), \
219 BOOST_PP_CAT(SENF_PARSER_VARIANT_KEY_GETKEY__, x), \
222 # define SENF_PARSER_VARIANT_HASID(x) \
223 BOOST_PP_IS_EMPTY( SENF_CAT_RECURS2(SENF_PARSER_VARIANT_ID_GOBBLE__, x) )
225 # define SENF_PARSER_VARIANT_GETID(x) \
226 BOOST_PP_CAT(SENF_PARSER_VARIANT_ID_GETID__, x)
228 # define SENF_PARSER_VARIANT_GETVALUE(x) \
229 BOOST_PP_IF( SENF_PARSER_VARIANT_HASID(x), \
230 BOOST_PP_CAT(SENF_PARSER_VARIANT_ID_GETVALUE__, x), \
233 # define SENF_PARSER_VARIANT_HASVALUE(x) \
234 BOOST_PP_IS_EMPTY( SENF_CAT_RECURS3(SENF_PARSER_VARIANT_HASVALUE_GOBBLE__, x) )
236 # define SENF_PARSER_VARIANT_GETTYPE(x) \
237 SENF_PARSER_VARIANT_GETTYPE_( SENF_PARSER_VARIANT_GETVALUE(x) )
239 # define SENF_PARSER_VARIANT_GETTYPE_(x) \
240 BOOST_PP_IF( SENF_PARSER_VARIANT_HASKEY_(x), \
241 BOOST_PP_CAT(SENF_PARSER_VARIANT_KEY_GETTYPE__, x), \
244 # define SENF_PARSER_VARIANT_NEEDTRANSFORM(types) \
245 BOOST_PP_SEQ_FOLD_LEFT(SENF_PARSER_VARIANT_NEEDTRANSFORM_, 0, types)
247 # define SENF_PARSER_VARIANT_NEEDTRANSFORM_(s, state, elem) \
248 BOOST_PP_OR(state, SENF_PARSER_VARIANT_HASKEY(elem))
250 # define SENF_PARSER_VARIANT_TYPES(types) \
251 BOOST_PP_SEQ_FOR_EACH(SENF_PARSER_VARIANT_TYPES_, _, types)
253 # define SENF_PARSER_VARIANT_TYPES_(r, _, elem) \
254 (SENF_PARSER_VARIANT_GETTYPE(elem))
260 ///////////////////////////////ih.e////////////////////////////////////////
267 // comment-column: 40
268 // c-file-style: "senf"
269 // indent-tabs-mode: nil
270 // ispell-local-dictionary: "american"
271 // compile-command: "scons -u test"