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00040 namespace Gecode {
00041
00050
00051 enum ViewSelStatus {
00052 VSS_NONE,
00053 VSS_SELECT,
00054 VSS_COMMIT
00055 };
00056
00083 template <class View, class Val, class ViewSel, class ValSel>
00084 class ViewValBranching : public Branching {
00085 protected:
00086 ViewArray<View> x;
00087 mutable int start;
00088
00089 ViewValBranching(Space* home, bool share, ViewValBranching& b);
00090 public:
00092 ViewValBranching(Space* home, ViewArray<View>& x);
00094 virtual bool status(const Space* home) const;
00096 virtual const BranchingDesc* description(const Space* home) const;
00098 virtual ExecStatus commit(Space* home, const BranchingDesc* d,
00099 unsigned int a);
00101 virtual Reflection::ActorSpec spec(const Space* home,
00102 Reflection::VarMap& m) const;
00104 virtual Reflection::BranchingSpec
00105 branchingSpec(const Space* home,
00106 Reflection::VarMap& m,
00107 const BranchingDesc* d) const;
00109 static Support::Symbol ati(void);
00111 static void post(Space* home, Reflection::VarMap& m,
00112 const Reflection::ActorSpec& spec);
00114 virtual Actor* copy(Space* home, bool share);
00115 };
00116
00134 template <class View, class Val, class ValSel>
00135 class ViewValAssignment : public Branching {
00136 protected:
00137 ViewArray<View> x;
00138 mutable int start;
00139
00140 ViewValAssignment(Space* home, bool share, ViewValAssignment& b);
00141 public:
00143 ViewValAssignment(Space* home, ViewArray<View>& x);
00145 virtual bool status(const Space* home) const;
00147 virtual const BranchingDesc* description(const Space* home) const;
00149 virtual ExecStatus commit(Space* home, const BranchingDesc* d,
00150 unsigned int a);
00152 virtual Reflection::ActorSpec spec(const Space* home,
00153 Reflection::VarMap& m) const;
00155 virtual Reflection::BranchingSpec
00156 branchingSpec(const Space* home,
00157 Reflection::VarMap& m,
00158 const BranchingDesc* d) const;
00160 static Support::Symbol ati(void);
00162 static void post(Space* home, Reflection::VarMap& m,
00163 const Reflection::ActorSpec& spec);
00165 virtual Actor* copy(Space* home, bool share);
00166 };
00167
00173 template <class Val, unsigned int alt>
00174 class PosValDesc : public BranchingDesc {
00175 protected:
00177 const int _pos;
00179 const Val _val;
00180 public:
00186 PosValDesc(const Branching* b, const int p, const Val& n);
00188 int pos(void) const;
00190 Val val(void) const;
00192 virtual size_t size(void) const;
00193 };
00194
00196
00197
00198
00199
00200
00201
00202
00203
00204
00205
00206
00207 template <class Val, unsigned int alt>
00208 forceinline
00209 PosValDesc<Val,alt>::PosValDesc(const Branching* b, const int p,
00210 const Val& n)
00211 : BranchingDesc(b,alt), _pos(p), _val(n) {}
00212
00213 template <class Val, unsigned int alt>
00214 forceinline int
00215 PosValDesc<Val,alt>::pos(void) const {
00216 return _pos;
00217 }
00218
00219 template <class Val, unsigned int alt>
00220 forceinline Val
00221 PosValDesc<Val,alt>::val(void) const {
00222 return _val;
00223 }
00224
00225 template <class Val, unsigned int alt>
00226 size_t
00227 PosValDesc<Val,alt>::size(void) const {
00228 return sizeof(PosValDesc<Val,alt>);
00229 }
00230
00231
00232
00233
00234
00235
00236
00237 template <class View, class Val, class ViewSel, class ValSel>
00238 forceinline
00239 ViewValBranching<View,Val,ViewSel,ValSel>
00240 ::ViewValBranching(Space* home, ViewArray<View>& x0)
00241 : Branching(home), x(x0), start(0) {}
00242
00243
00244 template <class View, class Val, class ViewSel, class ValSel>
00245 forceinline
00246 ViewValBranching<View,Val,ViewSel,ValSel>
00247 ::ViewValBranching(Space* home, bool share, ViewValBranching& b)
00248 : Branching(home,share,b), start(b.start) {
00249 x.update(home,share,b.x);
00250 }
00251
00252 template <class View, class Val, class ViewSel, class ValSel>
00253 Actor*
00254 ViewValBranching<View,Val,ViewSel,ValSel>::copy(Space* home, bool share) {
00255 return new (home)
00256 ViewValBranching<View,Val,ViewSel,ValSel>(home,share,*this);
00257 }
00258
00259 template <class View, class Val, class ViewSel, class ValSel>
00260 bool
00261 ViewValBranching<View,Val,ViewSel,ValSel>
00262 ::status(const Space*) const {
00263 for (int i=start; i < x.size(); i++)
00264 if (!x[i].assigned()) {
00265 start = i;
00266 return true;
00267 }
00268 return false;
00269 }
00270
00271 template <class View, class Val, class ViewSel, class ValSel>
00272 const BranchingDesc*
00273 ViewValBranching<View,Val,ViewSel,ValSel>
00274 ::description(const Space* home) const {
00275 assert(!x[start].assigned());
00276 ViewSel vs;
00277 ValSel vl;
00278 int i = start;
00279 int b = i++;
00280 if (vs.init(home,x[b]) != VSS_COMMIT)
00281 for (; i < x.size(); i++)
00282 if (!x[i].assigned())
00283 switch (vs.select(home,x[i])) {
00284 case VSS_SELECT: b=i; break;
00285 case VSS_COMMIT: b=i; goto create;
00286 case VSS_NONE: break;
00287 default: GECODE_NEVER;
00288 }
00289 create:
00290 return new PosValDesc<Val,2>(this,b,vl.val(home,x[b]));
00291 }
00292
00293 template <class View, class Val, class ViewSel, class ValSel>
00294 ExecStatus
00295 ViewValBranching<View,Val,ViewSel,ValSel>
00296 ::commit(Space* home, const BranchingDesc* d, unsigned int a) {
00297 const PosValDesc<Val,2>* pvd = static_cast<const PosValDesc<Val,2>*>(d);
00298 ValSel vs;
00299 return me_failed(vs.tell(home,a,x[pvd->pos()],pvd->val()))
00300 ? ES_FAILED : ES_OK;
00301 }
00302
00303 template <class View, class Val, class ViewSel, class ValSel>
00304 Support::Symbol
00305 ViewValBranching<View,Val,ViewSel,ValSel>::ati(void) {
00306 return Reflection::mangle<View,Val,ViewSel,ValSel>("Gecode::ViewValBranching");
00307 }
00308
00309 template <class View, class Val, class ViewSel, class ValSel>
00310 void
00311 ViewValBranching<View,Val,ViewSel,ValSel>
00312 ::post(Space* home, Reflection::VarMap& vars,
00313 const Reflection::ActorSpec& spec) {
00314 spec.checkArity(1);
00315 ViewArray<View> x(home, vars, spec[0]);
00316 (void) new (home) ViewValBranching<View,Val,ViewSel,ValSel>(home, x);
00317 }
00318
00319 template <class View, class Val, class ViewSel, class ValSel>
00320 Reflection::ActorSpec
00321 ViewValBranching<View,Val,ViewSel,ValSel>::spec(const Space* home,
00322 Reflection::VarMap& m) const {
00323 Reflection::ActorSpec s(ati());
00324 return s << x.spec(home, m);
00325 }
00326
00327 template <class View, class Val, class ViewSel, class ValSel>
00328 Reflection::BranchingSpec
00329 ViewValBranching<View,Val,ViewSel,ValSel>::branchingSpec(const Space* home,
00330 Reflection::VarMap& m, const BranchingDesc* d) const {
00331 Reflection::BranchingSpec bs(d);
00332 const PosValDesc<Val,2>* pvd = static_cast<const PosValDesc<Val,2>*>(d);
00333 ValSel vs;
00334 vs.branchingSpec(home, m, bs, 2, x[pvd->pos()], pvd->val());
00335 return bs;
00336 }
00337
00338
00339
00340
00341
00342
00343 template <class View, class Val, class ValSel>
00344 forceinline
00345 ViewValAssignment<View,Val,ValSel>
00346 ::ViewValAssignment(Space* home, ViewArray<View>& x0)
00347 : Branching(home), x(x0), start(0) {}
00348
00349
00350 template <class View, class Val, class ValSel>
00351 forceinline
00352 ViewValAssignment<View,Val,ValSel>
00353 ::ViewValAssignment(Space* home, bool share, ViewValAssignment& b)
00354 : Branching(home,share,b), start(b.start) {
00355 x.update(home,share,b.x);
00356 }
00357
00358 template <class View, class Val, class ValSel>
00359 Actor*
00360 ViewValAssignment<View,Val,ValSel>::copy(Space* home, bool share) {
00361 return new (home)
00362 ViewValAssignment<View,Val,ValSel>(home,share,*this);
00363 }
00364
00365 template <class View, class Val, class ValSel>
00366 bool
00367 ViewValAssignment<View,Val,ValSel>
00368 ::status(const Space*) const {
00369 for (int i=start; i < x.size(); i++)
00370 if (!x[i].assigned()) {
00371 start = i;
00372 return true;
00373 }
00374 return false;
00375 }
00376
00377 template <class View, class Val, class ValSel>
00378 const BranchingDesc*
00379 ViewValAssignment<View,Val,ValSel>
00380 ::description(const Space* home) const {
00381 assert(!x[start].assigned());
00382 ValSel vl;
00383 return new PosValDesc<Val,1>(this,start,vl.val(home,x[start]));
00384 }
00385
00386 template <class View, class Val, class ValSel>
00387 ExecStatus
00388 ViewValAssignment<View,Val,ValSel>
00389 ::commit(Space* home, const BranchingDesc* d, unsigned int) {
00390 const PosValDesc<Val,1>* pvd = static_cast<const PosValDesc<Val,1>*>(d);
00391 ValSel vs;
00392 return me_failed(vs.tell(home,0,x[pvd->pos()],pvd->val()))
00393 ? ES_FAILED : ES_OK;
00394 }
00395
00396 template <class View, class Val, class ValSel>
00397 Support::Symbol
00398 ViewValAssignment<View,Val,ValSel>::ati(void) {
00399 return Reflection::mangle<View,Val,ValSel>("Gecode::ViewValAssignment");
00400 }
00401
00402 template <class View, class Val, class ValSel>
00403 void
00404 ViewValAssignment<View,Val,ValSel>
00405 ::post(Space* home, Reflection::VarMap& vars,
00406 const Reflection::ActorSpec& spec) {
00407 spec.checkArity(1);
00408 ViewArray<View> x(home, vars, spec[0]);
00409 (void) new (home) ViewValAssignment<View,Val,ValSel>(home, x);
00410 }
00411
00412 template <class View, class Val, class ValSel>
00413 Reflection::ActorSpec
00414 ViewValAssignment<View,Val,ValSel>::spec(const Space* home,
00415 Reflection::VarMap& m) const {
00416 Reflection::ActorSpec s(ati());
00417 return s << x.spec(home, m);
00418 }
00419
00420 template <class View, class Val, class ValSel>
00421 Reflection::BranchingSpec
00422 ViewValAssignment<View,Val,ValSel>::branchingSpec(const Space* home,
00423 Reflection::VarMap& m, const BranchingDesc* d) const {
00424 Reflection::BranchingSpec bs(d);
00425 const PosValDesc<Val,1>* pvd = static_cast<const PosValDesc<Val,1>*>(d);
00426 ValSel vs;
00427 vs.branchingSpec(home, m, bs, 1, x[pvd->pos()], pvd->val());
00428 return bs;
00429 }
00430
00431 }
00432
00433