[857] | 1 |
|
---|
| 2 | // NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION
|
---|
| 3 |
|
---|
| 4 | #if !defined(BOOST_PP_IS_ITERATING)
|
---|
| 5 |
|
---|
| 6 | // Copyright Aleksey Gurtovoy 2000-2004
|
---|
| 7 | //
|
---|
| 8 | // Distributed under the Boost Software License, Version 1.0.
|
---|
| 9 | // (See accompanying file LICENSE_1_0.txt or copy at
|
---|
| 10 | // http://www.boost.org/LICENSE_1_0.txt)
|
---|
| 11 | //
|
---|
| 12 | // See http://www.boost.org/libs/mpl for documentation.
|
---|
| 13 |
|
---|
| 14 | // $Source: /cvsroot/boost/boost/boost/mpl/aux_/fold_impl_body.hpp,v $
|
---|
| 15 | // $Date: 2004/10/24 08:18:03 $
|
---|
| 16 | // $Revision: 1.8 $
|
---|
| 17 |
|
---|
| 18 | # include <boost/mpl/limits/unrolling.hpp>
|
---|
| 19 | # include <boost/mpl/aux_/preprocessor/repeat.hpp>
|
---|
| 20 | # include <boost/mpl/aux_/config/workaround.hpp>
|
---|
| 21 | # include <boost/mpl/aux_/config/ctps.hpp>
|
---|
| 22 | # include <boost/mpl/aux_/nttp_decl.hpp>
|
---|
| 23 | # include <boost/mpl/aux_/config/eti.hpp>
|
---|
| 24 |
|
---|
| 25 | # include <boost/preprocessor/iterate.hpp>
|
---|
| 26 | # include <boost/preprocessor/dec.hpp>
|
---|
| 27 | # include <boost/preprocessor/cat.hpp>
|
---|
| 28 |
|
---|
| 29 | // local macros, #undef-ined at the end of the header
|
---|
| 30 |
|
---|
| 31 | # define AUX778076_ITER_FOLD_STEP(unused, i, unused2) \
|
---|
| 32 | typedef typename apply2< \
|
---|
| 33 | ForwardOp \
|
---|
| 34 | , BOOST_PP_CAT(state,i) \
|
---|
| 35 | , AUX778076_FOLD_IMPL_OP(BOOST_PP_CAT(iter,i)) \
|
---|
| 36 | >::type BOOST_PP_CAT(state,BOOST_PP_INC(i)); \
|
---|
| 37 | typedef typename mpl::next<BOOST_PP_CAT(iter,i)>::type \
|
---|
| 38 | BOOST_PP_CAT(iter,BOOST_PP_INC(i)); \
|
---|
| 39 | /**/
|
---|
| 40 |
|
---|
| 41 | # define AUX778076_FOLD_IMPL_NAME \
|
---|
| 42 | BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_impl) \
|
---|
| 43 | /**/
|
---|
| 44 |
|
---|
| 45 | # define AUX778076_FOLD_CHUNK_NAME \
|
---|
| 46 | BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_chunk) \
|
---|
| 47 | /**/
|
---|
| 48 |
|
---|
| 49 | namespace boost { namespace mpl { namespace aux {
|
---|
| 50 |
|
---|
| 51 | /// forward declaration
|
---|
| 52 | template<
|
---|
| 53 | BOOST_MPL_AUX_NTTP_DECL(int, N)
|
---|
| 54 | , typename First
|
---|
| 55 | , typename Last
|
---|
| 56 | , typename State
|
---|
| 57 | , typename ForwardOp
|
---|
| 58 | >
|
---|
| 59 | struct AUX778076_FOLD_IMPL_NAME;
|
---|
| 60 |
|
---|
| 61 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
---|
| 62 |
|
---|
| 63 | # if !BOOST_WORKAROUND(__BORLANDC__, < 0x600)
|
---|
| 64 |
|
---|
| 65 | # define BOOST_PP_ITERATION_PARAMS_1 \
|
---|
| 66 | (3,(0, BOOST_MPL_LIMIT_UNROLLING, <boost/mpl/aux_/fold_impl_body.hpp>))
|
---|
| 67 | # include BOOST_PP_ITERATE()
|
---|
| 68 |
|
---|
| 69 | // implementation for N that exceeds BOOST_MPL_LIMIT_UNROLLING
|
---|
| 70 | template<
|
---|
| 71 | BOOST_MPL_AUX_NTTP_DECL(int, N)
|
---|
| 72 | , typename First
|
---|
| 73 | , typename Last
|
---|
| 74 | , typename State
|
---|
| 75 | , typename ForwardOp
|
---|
| 76 | >
|
---|
| 77 | struct AUX778076_FOLD_IMPL_NAME
|
---|
| 78 | {
|
---|
| 79 | typedef AUX778076_FOLD_IMPL_NAME<
|
---|
| 80 | BOOST_MPL_LIMIT_UNROLLING
|
---|
| 81 | , First
|
---|
| 82 | , Last
|
---|
| 83 | , State
|
---|
| 84 | , ForwardOp
|
---|
| 85 | > chunk_;
|
---|
| 86 |
|
---|
| 87 | typedef AUX778076_FOLD_IMPL_NAME<
|
---|
| 88 | ( (N - BOOST_MPL_LIMIT_UNROLLING) < 0 ? 0 : N - BOOST_MPL_LIMIT_UNROLLING )
|
---|
| 89 | , typename chunk_::iterator
|
---|
| 90 | , Last
|
---|
| 91 | , typename chunk_::state
|
---|
| 92 | , ForwardOp
|
---|
| 93 | > res_;
|
---|
| 94 |
|
---|
| 95 | typedef typename res_::state state;
|
---|
| 96 | typedef typename res_::iterator iterator;
|
---|
| 97 | };
|
---|
| 98 |
|
---|
| 99 | // fallback implementation for sequences of unknown size
|
---|
| 100 | template<
|
---|
| 101 | typename First
|
---|
| 102 | , typename Last
|
---|
| 103 | , typename State
|
---|
| 104 | , typename ForwardOp
|
---|
| 105 | >
|
---|
| 106 | struct AUX778076_FOLD_IMPL_NAME<-1,First,Last,State,ForwardOp>
|
---|
| 107 | : AUX778076_FOLD_IMPL_NAME<
|
---|
| 108 | -1
|
---|
| 109 | , typename mpl::next<First>::type
|
---|
| 110 | , Last
|
---|
| 111 | , typename apply2<ForwardOp,State,AUX778076_FOLD_IMPL_OP(First)>::type
|
---|
| 112 | , ForwardOp
|
---|
| 113 | >
|
---|
| 114 | {
|
---|
| 115 | };
|
---|
| 116 |
|
---|
| 117 | template<
|
---|
| 118 | typename Last
|
---|
| 119 | , typename State
|
---|
| 120 | , typename ForwardOp
|
---|
| 121 | >
|
---|
| 122 | struct AUX778076_FOLD_IMPL_NAME<-1,Last,Last,State,ForwardOp>
|
---|
| 123 | {
|
---|
| 124 | typedef State state;
|
---|
| 125 | typedef Last iterator;
|
---|
| 126 | };
|
---|
| 127 |
|
---|
| 128 | # else // BOOST_WORKAROUND(__BORLANDC__, < 0x600)
|
---|
| 129 |
|
---|
| 130 | // Borland have some serious problems with the unrolled version, so
|
---|
| 131 | // we always use a basic implementation
|
---|
| 132 | template<
|
---|
| 133 | BOOST_MPL_AUX_NTTP_DECL(int, N)
|
---|
| 134 | , typename First
|
---|
| 135 | , typename Last
|
---|
| 136 | , typename State
|
---|
| 137 | , typename ForwardOp
|
---|
| 138 | >
|
---|
| 139 | struct AUX778076_FOLD_IMPL_NAME
|
---|
| 140 | {
|
---|
| 141 | typedef AUX778076_FOLD_IMPL_NAME<
|
---|
| 142 | -1
|
---|
| 143 | , typename mpl::next<First>::type
|
---|
| 144 | , Last
|
---|
| 145 | , typename apply2<ForwardOp,State,AUX778076_FOLD_IMPL_OP(First)>::type
|
---|
| 146 | , ForwardOp
|
---|
| 147 | > res_;
|
---|
| 148 |
|
---|
| 149 | typedef typename res_::state state;
|
---|
| 150 | typedef typename res_::iterator iterator;
|
---|
| 151 | typedef state type;
|
---|
| 152 | };
|
---|
| 153 |
|
---|
| 154 | template<
|
---|
| 155 | BOOST_MPL_AUX_NTTP_DECL(int, N)
|
---|
| 156 | , typename Last
|
---|
| 157 | , typename State
|
---|
| 158 | , typename ForwardOp
|
---|
| 159 | >
|
---|
| 160 | struct AUX778076_FOLD_IMPL_NAME<N,Last,Last,State,ForwardOp >
|
---|
| 161 | {
|
---|
| 162 | typedef State state;
|
---|
| 163 | typedef Last iterator;
|
---|
| 164 | typedef state type;
|
---|
| 165 | };
|
---|
| 166 |
|
---|
| 167 | # endif // BOOST_WORKAROUND(__BORLANDC__, < 0x600)
|
---|
| 168 |
|
---|
| 169 | #else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
---|
| 170 |
|
---|
| 171 | template< BOOST_MPL_AUX_NTTP_DECL(int, N) >
|
---|
| 172 | struct AUX778076_FOLD_CHUNK_NAME;
|
---|
| 173 |
|
---|
| 174 | # define BOOST_PP_ITERATION_PARAMS_1 \
|
---|
| 175 | (3,(0, BOOST_MPL_LIMIT_UNROLLING, <boost/mpl/aux_/fold_impl_body.hpp>))
|
---|
| 176 | # include BOOST_PP_ITERATE()
|
---|
| 177 |
|
---|
| 178 | // implementation for N that exceeds BOOST_MPL_LIMIT_UNROLLING
|
---|
| 179 | template< BOOST_MPL_AUX_NTTP_DECL(int, N) >
|
---|
| 180 | struct AUX778076_FOLD_CHUNK_NAME
|
---|
| 181 | {
|
---|
| 182 | template<
|
---|
| 183 | typename First
|
---|
| 184 | , typename Last
|
---|
| 185 | , typename State
|
---|
| 186 | , typename ForwardOp
|
---|
| 187 | >
|
---|
| 188 | struct result_
|
---|
| 189 | {
|
---|
| 190 | typedef AUX778076_FOLD_IMPL_NAME<
|
---|
| 191 | BOOST_MPL_LIMIT_UNROLLING
|
---|
| 192 | , First
|
---|
| 193 | , Last
|
---|
| 194 | , State
|
---|
| 195 | , ForwardOp
|
---|
| 196 | > chunk_;
|
---|
| 197 |
|
---|
| 198 | typedef AUX778076_FOLD_IMPL_NAME<
|
---|
| 199 | ( (N - BOOST_MPL_LIMIT_UNROLLING) < 0 ? 0 : N - BOOST_MPL_LIMIT_UNROLLING )
|
---|
| 200 | , typename chunk_::iterator
|
---|
| 201 | , Last
|
---|
| 202 | , typename chunk_::state
|
---|
| 203 | , ForwardOp
|
---|
| 204 | > res_;
|
---|
| 205 |
|
---|
| 206 | typedef typename res_::state state;
|
---|
| 207 | typedef typename res_::iterator iterator;
|
---|
| 208 | };
|
---|
| 209 | };
|
---|
| 210 |
|
---|
| 211 | // fallback implementation for sequences of unknown size
|
---|
| 212 | template<
|
---|
| 213 | typename First
|
---|
| 214 | , typename Last
|
---|
| 215 | , typename State
|
---|
| 216 | , typename ForwardOp
|
---|
| 217 | >
|
---|
| 218 | struct BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_step);
|
---|
| 219 |
|
---|
| 220 | template<
|
---|
| 221 | typename Last
|
---|
| 222 | , typename State
|
---|
| 223 | >
|
---|
| 224 | struct BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_null_step)
|
---|
| 225 | {
|
---|
| 226 | typedef Last iterator;
|
---|
| 227 | typedef State state;
|
---|
| 228 | };
|
---|
| 229 |
|
---|
| 230 | template<>
|
---|
| 231 | struct AUX778076_FOLD_CHUNK_NAME<-1>
|
---|
| 232 | {
|
---|
| 233 | template<
|
---|
| 234 | typename First
|
---|
| 235 | , typename Last
|
---|
| 236 | , typename State
|
---|
| 237 | , typename ForwardOp
|
---|
| 238 | >
|
---|
| 239 | struct result_
|
---|
| 240 | {
|
---|
| 241 | typedef typename if_<
|
---|
| 242 | typename is_same<First,Last>::type
|
---|
| 243 | , BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_null_step)<Last,State>
|
---|
| 244 | , BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_step)<First,Last,State,ForwardOp>
|
---|
| 245 | >::type res_;
|
---|
| 246 |
|
---|
| 247 | typedef typename res_::state state;
|
---|
| 248 | typedef typename res_::iterator iterator;
|
---|
| 249 | };
|
---|
| 250 |
|
---|
| 251 | #if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
|
---|
| 252 | /// ETI workaround
|
---|
| 253 | template<> struct result_<int,int,int,int>
|
---|
| 254 | {
|
---|
| 255 | typedef int state;
|
---|
| 256 | typedef int iterator;
|
---|
| 257 | };
|
---|
| 258 | #endif
|
---|
| 259 | };
|
---|
| 260 |
|
---|
| 261 | template<
|
---|
| 262 | typename First
|
---|
| 263 | , typename Last
|
---|
| 264 | , typename State
|
---|
| 265 | , typename ForwardOp
|
---|
| 266 | >
|
---|
| 267 | struct BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_step)
|
---|
| 268 | {
|
---|
| 269 | // can't inherit here - it breaks MSVC 7.0
|
---|
| 270 | typedef AUX778076_FOLD_CHUNK_NAME<-1>::template result_<
|
---|
| 271 | typename mpl::next<First>::type
|
---|
| 272 | , Last
|
---|
| 273 | , typename apply2<ForwardOp,State,AUX778076_FOLD_IMPL_OP(First)>::type
|
---|
| 274 | , ForwardOp
|
---|
| 275 | > chunk_;
|
---|
| 276 |
|
---|
| 277 | typedef typename chunk_::state state;
|
---|
| 278 | typedef typename chunk_::iterator iterator;
|
---|
| 279 | };
|
---|
| 280 |
|
---|
| 281 | template<
|
---|
| 282 | BOOST_MPL_AUX_NTTP_DECL(int, N)
|
---|
| 283 | , typename First
|
---|
| 284 | , typename Last
|
---|
| 285 | , typename State
|
---|
| 286 | , typename ForwardOp
|
---|
| 287 | >
|
---|
| 288 | struct AUX778076_FOLD_IMPL_NAME
|
---|
| 289 | : AUX778076_FOLD_CHUNK_NAME<N>
|
---|
| 290 | ::template result_<First,Last,State,ForwardOp>
|
---|
| 291 | {
|
---|
| 292 | };
|
---|
| 293 |
|
---|
| 294 | #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
---|
| 295 |
|
---|
| 296 | }}}
|
---|
| 297 |
|
---|
| 298 | # undef AUX778076_FOLD_IMPL_NAME
|
---|
| 299 | # undef AUX778076_FOLD_CHUNK_NAME
|
---|
| 300 | # undef AUX778076_ITER_FOLD_STEP
|
---|
| 301 |
|
---|
| 302 | #undef AUX778076_FOLD_IMPL_OP
|
---|
| 303 | #undef AUX778076_FOLD_IMPL_NAME_PREFIX
|
---|
| 304 |
|
---|
| 305 | ///// iteration
|
---|
| 306 |
|
---|
| 307 | #else
|
---|
| 308 |
|
---|
| 309 | # define n_ BOOST_PP_FRAME_ITERATION(1)
|
---|
| 310 |
|
---|
| 311 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
---|
| 312 |
|
---|
| 313 | template<
|
---|
| 314 | typename First
|
---|
| 315 | , typename Last
|
---|
| 316 | , typename State
|
---|
| 317 | , typename ForwardOp
|
---|
| 318 | >
|
---|
| 319 | struct AUX778076_FOLD_IMPL_NAME<n_,First,Last,State,ForwardOp>
|
---|
| 320 | {
|
---|
| 321 | typedef First iter0;
|
---|
| 322 | typedef State state0;
|
---|
| 323 |
|
---|
| 324 | BOOST_MPL_PP_REPEAT(n_, AUX778076_ITER_FOLD_STEP, unused)
|
---|
| 325 |
|
---|
| 326 | typedef BOOST_PP_CAT(state,n_) state;
|
---|
| 327 | typedef BOOST_PP_CAT(iter,n_) iterator;
|
---|
| 328 | };
|
---|
| 329 |
|
---|
| 330 | #else
|
---|
| 331 |
|
---|
| 332 | template<> struct AUX778076_FOLD_CHUNK_NAME<n_>
|
---|
| 333 | {
|
---|
| 334 | template<
|
---|
| 335 | typename First
|
---|
| 336 | , typename Last
|
---|
| 337 | , typename State
|
---|
| 338 | , typename ForwardOp
|
---|
| 339 | >
|
---|
| 340 | struct result_
|
---|
| 341 | {
|
---|
| 342 | typedef First iter0;
|
---|
| 343 | typedef State state0;
|
---|
| 344 |
|
---|
| 345 | BOOST_MPL_PP_REPEAT(n_, AUX778076_ITER_FOLD_STEP, unused)
|
---|
| 346 |
|
---|
| 347 | typedef BOOST_PP_CAT(state,n_) state;
|
---|
| 348 | typedef BOOST_PP_CAT(iter,n_) iterator;
|
---|
| 349 | };
|
---|
| 350 |
|
---|
| 351 | #if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
|
---|
| 352 | /// ETI workaround
|
---|
| 353 | template<> struct result_<int,int,int,int>
|
---|
| 354 | {
|
---|
| 355 | typedef int state;
|
---|
| 356 | typedef int iterator;
|
---|
| 357 | };
|
---|
| 358 | #endif
|
---|
| 359 | };
|
---|
| 360 |
|
---|
| 361 | #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
---|
| 362 |
|
---|
| 363 | # undef n_
|
---|
| 364 |
|
---|
| 365 | #endif // BOOST_PP_IS_ITERATING
|
---|