tgba.hh 24 KB
 Alexandre Duret-Lutz committed Feb 12, 2014 1 // -*- coding: utf-8 -*-  Alexandre Duret-Lutz committed Feb 04, 2015 2 3 // Copyright (C) 2009, 2011, 2013, 2014, 2015 Laboratoire de Recherche // et Développement de l'Epita (LRDE).  Guillaume Sadegh committed Jan 24, 2010 4 // Copyright (C) 2003, 2004, 2005 Laboratoire d'Informatique de  Alexandre Duret-Lutz committed Feb 12, 2014 5 6 // Paris 6 (LIP6), département Systèmes Répartis Coopératifs (SRC), // Université Pierre et Marie Curie.  Alexandre Duret-Lutz committed Nov 21, 2003 7 8 9 10 11 // // This file is part of Spot, a model checking library. // // Spot is free software; you can redistribute it and/or modify it // under the terms of the GNU General Public License as published by  Alexandre Duret-Lutz committed Oct 12, 2012 12 // the Free Software Foundation; either version 3 of the License, or  Alexandre Duret-Lutz committed Nov 21, 2003 13 14 15 16 17 18 19 20 // (at your option) any later version. // // Spot is distributed in the hope that it will be useful, but WITHOUT // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public // License for more details. // // You should have received a copy of the GNU General Public License  Alexandre Duret-Lutz committed Oct 12, 2012 21 // along with this program. If not, see .  Alexandre Duret-Lutz committed Nov 21, 2003 22   Alexandre Duret-Lutz committed May 26, 2003 23 24 25 #ifndef SPOT_TGBA_TGBA_HH # define SPOT_TGBA_TGBA_HH  Alexandre Duret-Lutz committed Aug 15, 2014 26 #include "fwd.hh"  Alexandre Duret-Lutz committed Oct 06, 2014 27 #include "acc.hh"  Alexandre Duret-Lutz committed Feb 04, 2015 28 #include "bdddict.hh"  Alexandre Duret-Lutz committed Aug 19, 2014 29 30 #include #include  Alexandre Duret-Lutz committed Oct 08, 2014 31 32 #include #include  Alexandre Duret-Lutz committed Jan 03, 2015 33 #include  Alexandre Duret-Lutz committed Aug 19, 2014 34 35 #include "misc/casts.hh" #include "misc/hash.hh"  Alexandre Duret-Lutz committed May 26, 2003 36 37 38  namespace spot {  Alexandre Duret-Lutz committed Aug 19, 2014 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393  /// \ingroup tgba_essentials /// \brief Abstract class for states. class SPOT_API state { public: /// \brief Compares two states (that come from the same automaton). /// /// This method returns an integer less than, equal to, or greater /// than zero if \a this is found, respectively, to be less than, equal /// to, or greater than \a other according to some implicit total order. /// /// This method should not be called to compare states from /// different automata. /// /// \sa spot::state_ptr_less_than virtual int compare(const state* other) const = 0; /// \brief Hash a state. /// /// This method returns an integer that can be used as a /// hash value for this state. /// /// Note that the hash value is guaranteed to be unique for all /// equal states (in compare()'s sense) for only has long has one /// of these states exists. So it's OK to use a spot::state as a /// key in a \c hash_map because the mere use of the state as a /// key in the hash will ensure the state continues to exist. /// /// However if you create the state, get its hash key, delete the /// state, recreate the same state, and get its hash key, you may /// obtain two different hash keys if the same state were not /// already used elsewhere. In practice this weird situation can /// occur only when the state is BDD-encoded, because BDD numbers /// (used to build the hash value) can be reused for other /// formulas. That probably doesn't matter, since the hash value /// is meant to be used in a \c hash_map, but it had to be noted. virtual size_t hash() const = 0; /// Duplicate a state. virtual state* clone() const = 0; /// \brief Release a state. /// /// Methods from the tgba or tgba_succ_iterator always return a /// new state that you should deallocate with this function. /// Before Spot 0.7, you had to "delete" your state directly. /// Starting with Spot 0.7, you should update your code to use /// this function instead. destroy() usually call delete, except /// in subclasses that destroy() to allow better memory management /// (e.g., no memory allocation for explicit automata). virtual void destroy() const { delete this; } protected: /// \brief Destructor. /// /// Note that client code should call /// s->destroy(); instead of delete s;. virtual ~state() { } }; /// \ingroup tgba_essentials /// \brief Strict Weak Ordering for \c state*. /// /// This is meant to be used as a comparison functor for /// STL \c map whose key are of type \c state*. /// /// For instance here is how one could declare /// a map of \c state*. /// \code /// // Remember how many times each state has been visited. /// std::map seen; /// \endcode struct state_ptr_less_than { bool operator()(const state* left, const state* right) const { assert(left); return left->compare(right) < 0; } }; /// \ingroup tgba_essentials /// \brief An Equivalence Relation for \c state*. /// /// This is meant to be used as a comparison functor for /// an \c unordered_map whose key are of type \c state*. /// /// For instance here is how one could declare /// a map of \c state*. /// \code /// // Remember how many times each state has been visited. /// std::unordered_map seen; /// \endcode struct state_ptr_equal { bool operator()(const state* left, const state* right) const { assert(left); return 0 == left->compare(right); } }; /// \ingroup tgba_essentials /// \ingroup hash_funcs /// \brief Hash Function for \c state*. /// /// This is meant to be used as a hash functor for /// an \c unordered_map whose key are of type \c state*. /// /// For instance here is how one could declare /// a map of \c state*. /// \code /// // Remember how many times each state has been visited. /// std::unordered_map seen; /// \endcode struct state_ptr_hash { size_t operator()(const state* that) const { assert(that); return that->hash(); } }; typedef std::unordered_set state_set; /// \ingroup tgba_essentials /// \brief Render state pointers unique via a hash table. class SPOT_API state_unicity_table { state_set m; public: /// \brief Canonicalize state pointer. /// /// If this is the first time a state is seen, this return the /// state pointer as-is, otherwise it frees the state and returns /// a point to the previously seen copy. /// /// States are owned by the table and will be freed on /// destruction. const state* operator()(const state* s) { auto p = m.insert(s); if (!p.second) s->destroy(); return *p.first; } /// \brief Canonicalize state pointer. /// /// Same as operator(), except that a nullptr /// is returned if the state is not new. const state* is_new(const state* s) { auto p = m.insert(s); if (!p.second) { s->destroy(); return nullptr; } return *p.first; } ~state_unicity_table() { for (state_set::iterator i = m.begin(); i != m.end();) { // Advance the iterator before destroying its key. This // avoid issues with old g++ implementations. state_set::iterator old = i++; (*old)->destroy(); } } size_t size() { return m.size(); } }; // Functions related to shared_ptr. ////////////////////////////////////////////////// typedef std::shared_ptr shared_state; inline void shared_state_deleter(state* s) { s->destroy(); } /// \ingroup tgba_essentials /// \brief Strict Weak Ordering for \c shared_state /// (shared_ptr). /// /// This is meant to be used as a comparison functor for /// STL \c map whose key are of type \c shared_state. /// /// For instance here is how one could declare /// a map of \c shared_state. /// \code /// // Remember how many times each state has been visited. /// std::map seen; /// \endcode struct state_shared_ptr_less_than { bool operator()(shared_state left, shared_state right) const { assert(left); return left->compare(right.get()) < 0; } }; /// \ingroup tgba_essentials /// \brief An Equivalence Relation for \c shared_state /// (shared_ptr). /// /// This is meant to be used as a comparison functor for /// un \c unordered_map whose key are of type \c shared_state. /// /// For instance here is how one could declare /// a map of \c shared_state /// \code /// // Remember how many times each state has been visited. /// std::unordered_map seen; /// \endcode struct state_shared_ptr_equal { bool operator()(shared_state left, shared_state right) const { assert(left); return 0 == left->compare(right.get()); } }; /// \ingroup tgba_essentials /// \ingroup hash_funcs /// \brief Hash Function for \c shared_state (shared_ptr). /// /// This is meant to be used as a hash functor for /// an \c unordered_map whose key are of type /// \c shared_state. /// /// For instance here is how one could declare /// a map of \c shared_state. /// \code /// // Remember how many times each state has been visited. /// std::unordered_map seen; /// \endcode struct state_shared_ptr_hash { size_t operator()(shared_state that) const { assert(that); return that->hash(); } }; typedef std::unordered_set shared_state_set; /// \ingroup tgba_essentials /// \brief Iterate over the successors of a state. /// /// This class provides the basic functionalities required to /// iterate over the successors of a state, as well as querying /// transition labels. Because transitions are never explicitely /// encoded, labels (conditions and acceptance conditions) can only /// be queried while iterating over the successors. class SPOT_API tgba_succ_iterator { public: virtual ~tgba_succ_iterator() { } /// \name Iteration //@{ /// \brief Position the iterator on the first successor (if any). /// /// This method can be called several times to make multiple /// passes over successors. /// /// \warning One should always call \c done() (or better: check /// the return value of first()) to ensure there is a successor, /// even after \c first(). A common trap is to assume that there /// is at least one successor: this is wrong. /// /// \return whether there is actually a successor virtual bool first() = 0; /// \brief Jump to the next successor (if any). /// /// \warning Again, one should always call \c done() (or better: /// check the return value of next()) ensure there is a successor. /// /// \return whether there is actually a successor virtual bool next() = 0; /// \brief Check whether the iteration is finished. /// /// This function should be called after any call to \c first() /// or \c next() and before any enquiry about the current state. /// /// The usual way to do this is with a \c for loop. /// /// for (s->first(); !s->done(); s->next()) /// ... virtual bool done() const = 0; //@} /// \name Inspection //@{ /// \brief Get the state of the current successor. /// /// Note that the same state may occur at different points /// in the iteration. These actually correspond to the same /// destination. It just means there were several transitions, /// with different conditions, leading to the same state. /// /// The returned state should be destroyed (see state::destroy) /// by the caller after it is no longer used. virtual state* current_state() const = 0; /// \brief Get the condition on the transition leading to this successor. /// /// This is a boolean function of atomic propositions. virtual bdd current_condition() const = 0; /// \brief Get the acceptance conditions on the transition leading /// to this successor.  Alexandre Duret-Lutz committed Oct 06, 2014 394  virtual acc_cond::mark_t current_acceptance_conditions() const = 0;  Alexandre Duret-Lutz committed Aug 19, 2014 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433  //@} }; namespace internal { struct SPOT_API succ_iterator { protected: tgba_succ_iterator* it_; public: succ_iterator(tgba_succ_iterator* it): it_(it) { } bool operator==(succ_iterator o) const { return it_ == o.it_; } bool operator!=(succ_iterator o) const { return it_ != o.it_; } const tgba_succ_iterator* operator*() const { return it_; } void operator++() { if (!it_->next()) it_ = nullptr; } }; }  Alexandre Duret-Lutz committed Feb 12, 2014 434 435  /// \defgroup tgba TGBA (Transition-based Generalized Büchi Automata)  Alexandre Duret-Lutz committed Nov 16, 2004 436 437 438 439 440 441 442 443 444 445 446 447 448  /// /// Spot is centered around the spot::tgba type. This type and its /// cousins are listed \ref tgba_essentials "here". This is an /// abstract interface. Its implementations are either \ref /// tgba_representation "concrete representations", or \ref /// tgba_on_the_fly_algorithms "on-the-fly algorithms". Other /// algorithms that work on spot::tgba are \ref tgba_algorithms /// "listed separately". /// \addtogroup tgba_essentials Essential TGBA types /// \ingroup tgba /// \ingroup tgba_essentials  Alexandre Duret-Lutz committed Feb 12, 2014 449  /// \brief A Transition-based Generalized Büchi Automaton.  Alexandre Duret-Lutz committed May 27, 2003 450  ///  Alexandre Duret-Lutz committed Feb 12, 2014 451  /// The acronym TGBA (Transition-based Generalized Büchi Automaton)  Alexandre Duret-Lutz committed May 27, 2003 452 453  /// was coined by Dimitra Giannakopoulou and Flavio Lerda /// in "From States to Transitions: Improving Translation of LTL  Alexandre Duret-Lutz committed Feb 12, 2014 454  /// Formulae to Büchi Automata". (FORTE'02)  Alexandre Duret-Lutz committed May 27, 2003 455 456  /// /// TGBAs are transition-based, meanings their labels are put  Alexandre Duret-Lutz committed Feb 12, 2014 457  /// on arcs, not on nodes. They use Generalized Büchi acceptance  Alexandre Duret-Lutz committed Nov 28, 2003 458  /// conditions: there are several acceptance sets (of  Alexandre Duret-Lutz committed Feb 23, 2009 459  /// transitions), and a path can be accepted only if it traverses  Alexandre Duret-Lutz committed May 27, 2003 460 461  /// at least one transition of each set infinitely often. ///  Alexandre Duret-Lutz committed Feb 23, 2009 462  /// Browsing such automaton can be achieved using two functions:  Alexandre Duret-Lutz committed May 27, 2003 463  /// \c get_init_state, and \c succ_iter. The former returns  Alexandre Duret-Lutz committed Feb 23, 2009 464  /// the initial state while the latter lists the  Alexandre Duret-Lutz committed May 27, 2003 465 466 467 468 469 470  /// successor states of any state. /// /// Note that although this is a transition-based automata, /// we never represent transitions! Transition informations are /// obtained by querying the iterator over the successors of /// a state.  Alexandre Duret-Lutz committed Aug 23, 2014 471  class SPOT_API tgba: public std::enable_shared_from_this  Alexandre Duret-Lutz committed May 26, 2003 472  {  Alexandre Duret-Lutz committed Jul 17, 2003 473  protected:  Alexandre Duret-Lutz committed Oct 06, 2014 474  tgba(const bdd_dict_ptr& d);  Alexandre Duret-Lutz committed Feb 12, 2014 475 476  // Any iterator returned via release_iter. mutable tgba_succ_iterator* iter_cache_;  Alexandre Duret-Lutz committed Feb 04, 2015 477  bdd_dict_ptr dict_;  Alexandre Duret-Lutz committed Jul 17, 2003 478  public:  Alexandre Duret-Lutz committed Feb 12, 2014 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505  #ifndef SWIG class succ_iterable { protected: const tgba* aut_; tgba_succ_iterator* it_; public: succ_iterable(const tgba* aut, tgba_succ_iterator* it) : aut_(aut), it_(it) { } succ_iterable(succ_iterable&& other) : aut_(other.aut_), it_(other.it_) { other.it_ = nullptr; } ~succ_iterable() { if (it_) aut_->release_iter(it_); } internal::succ_iterator begin() {  Alexandre Duret-Lutz committed Feb 12, 2014 506  return it_->first() ? it_ : nullptr;  Alexandre Duret-Lutz committed Feb 12, 2014 507 508 509 510 511 512 513 514 515  } internal::succ_iterator end() { return nullptr; } }; #endif  Alexandre Duret-Lutz committed Jul 25, 2003 516 517  virtual ~tgba();  Alexandre Duret-Lutz committed May 27, 2003 518 519 520  /// \brief Get the initial state of the automaton. /// /// The state has been allocated with \c new. It is the  Alexandre Duret-Lutz committed Jan 27, 2011 521  /// responsability of the caller to \c destroy it when no  Alexandre Duret-Lutz committed May 27, 2003 522 523  /// longer needed. virtual state* get_init_state() const = 0;  Alexandre Duret-Lutz committed May 26, 2003 524   Alexandre Duret-Lutz committed Jul 17, 2003 525  /// \brief Get an iterator over the successors of \a local_state.  Alexandre Duret-Lutz committed May 27, 2003 526 527 528 529  /// /// The iterator has been allocated with \c new. It is the /// responsability of the caller to \c delete it when no /// longer needed.  Alexandre Duret-Lutz committed Jul 17, 2003 530  virtual tgba_succ_iterator*  Alexandre Duret-Lutz committed Feb 17, 2014 531  succ_iter(const state* local_state) const = 0;  Alexandre Duret-Lutz committed Feb 12, 2014 532   Alexandre Duret-Lutz committed Feb 12, 2014 533 #ifndef SWIG  Alexandre Duret-Lutz committed Feb 12, 2014 534 535 536 537  /// \brief Build an iterable over the successors of \a s. /// /// This is meant to be used as /// for (auto i: aut->out(s)) { /* i->current_state() */ }.  Alexandre Duret-Lutz committed Feb 12, 2014 538  succ_iterable  Alexandre Duret-Lutz committed Feb 12, 2014 539 540 541 542  succ(const state* s) const { return {this, succ_iter(s)}; }  Alexandre Duret-Lutz committed Feb 12, 2014 543 544 545 546 547 548 549 550 551 552 553 554 555 #endif /// \brief Release an iterator after usage. /// /// This iterator can then be reused by succ_iter() to avoid /// memory allocation. void release_iter(tgba_succ_iterator* i) const { if (iter_cache_) delete i; else iter_cache_ = i; }  Alexandre Duret-Lutz committed Jul 17, 2003 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571  /// \brief Get a formula that must hold whatever successor is taken. /// /// \return A formula which must be verified for all successors /// of \a state. /// /// This can be as simple as \c bddtrue, or more completely /// the disjunction of the condition of all successors. This /// is used as an hint by \c succ_iter() to reduce the number /// of successor to compute in a product. /// /// Sub classes should implement compute_support_conditions(), /// this function is just a wrapper that will cache the /// last return value for efficiency. bdd support_conditions(const state* state) const;  Alexandre Duret-Lutz committed May 27, 2003 572 573  /// \brief Get the dictionary associated to the automaton. ///  Alexandre Duret-Lutz committed Jun 09, 2013 574 575 576 577 578  /// Atomic propositions and acceptance conditions are represented /// as BDDs. The dictionary allows to map BDD variables back to /// formulae, and vice versa. This is useful when dealing with /// several automata (which may use the same BDD variable for /// different formula), or simply when printing.  Alexandre Duret-Lutz committed Oct 06, 2014 579 580  bdd_dict_ptr get_dict() const {  Alexandre Duret-Lutz committed Feb 04, 2015 581  return dict_;  Alexandre Duret-Lutz committed Oct 06, 2014 582  }  Alexandre Duret-Lutz committed May 27, 2003 583 584 585 586  /// \brief Format the state as a string for printing. /// /// This formating is the responsability of the automata  Alexandre Duret-Lutz committed May 28, 2009 587  /// that owns the state.  Alexandre Duret-Lutz committed May 27, 2003 588  virtual std::string format_state(const state* state) const = 0;  Alexandre Duret-Lutz committed Jun 23, 2003 589   Alexandre Duret-Lutz committed Oct 29, 2004 590 591 592  /// \brief Return a possible annotation for the transition /// pointed to by the iterator. ///  Alexandre Duret-Lutz committed Nov 17, 2011 593 594 595 596 597  /// You may decide to use annotations when building a tgba class /// that represents the state space of a model, for instance to /// indicate how the tgba transitions relate to the original model /// (e.g. the annotation could be the name of a PetriNet /// transition, or the line number of some textual formalism).  Alexandre Duret-Lutz committed Oct 29, 2004 598  ///  Alexandre Duret-Lutz committed Nov 17, 2011 599 600 601 602 603 604 605  /// Implementing this method is optional; the default annotation /// is the empty string. /// /// This method is used for instance in dotty_reachable(), /// and replay_tgba_run(). /// /// \param t a non-done tgba_succ_iterator for this automaton  Alexandre Duret-Lutz committed Oct 29, 2004 606 607 608  virtual std::string transition_annotation(const tgba_succ_iterator* t) const;  Alexandre Duret-Lutz committed Nov 17, 2004 609  /// \brief Project a state on an automaton.  Alexandre Duret-Lutz committed Jul 30, 2003 610 611 612 613 614 615 616 617 618 619 620  /// /// This converts \a s, into that corresponding spot::state for \a /// t. This is useful when you have the state of a product, and /// want restrict this state to a specific automata occuring in /// the product. /// /// It goes without saying that \a s and \a t should be compatible /// (i.e., \a s is a state of \a t). /// /// \return 0 if the projection fails (\a s is unrelated to \a t), /// or a new \c state* (the projected state) that must be  Alexandre Duret-Lutz committed Jan 27, 2011 621  /// destroyed by the caller.  Alexandre Duret-Lutz committed Aug 15, 2014 622 623  virtual state* project_state(const state* s, const const_tgba_ptr& t) const;  Alexandre Duret-Lutz committed Jul 30, 2003 624   Alexandre Duret-Lutz committed Jun 23, 2003 625   Alexandre Duret-Lutz committed Oct 06, 2014 626 627 628 629  const acc_cond& acc() const { return acc_; }  Alexandre Duret-Lutz committed Nov 04, 2004 630   Alexandre Duret-Lutz committed Oct 06, 2014 631 632 633 634  acc_cond& acc() { return acc_; }  Alexandre Duret-Lutz committed Jul 17, 2003 635   Alexandre Duret-Lutz committed Aug 23, 2014 636 637  virtual bool is_empty() const;  Alexandre Duret-Lutz committed Jul 17, 2003 638  protected:  Alexandre Duret-Lutz committed Oct 06, 2014 639 640  acc_cond acc_;  Alexandre Duret-Lutz committed Mar 18, 2015 641 642 643 644 645 646 647 648 649 650  void set_num_sets_(unsigned num) { if (num < acc_.num_sets()) { acc_.~acc_cond(); new (&acc_) acc_cond; } acc_.add_sets(num - acc_.num_sets()); }  Alexandre Duret-Lutz committed Feb 23, 2015 651  public:  Alexandre Duret-Lutz committed Feb 26, 2015 652  const acc_cond::acc_code& get_acceptance() const  Alexandre Duret-Lutz committed Feb 23, 2015 653 654 655  { return acc_.get_acceptance(); }  Alexandre Duret-Lutz committed Feb 23, 2015 656 657 658  void set_acceptance(unsigned num, const acc_cond::acc_code& c) {  Alexandre Duret-Lutz committed Mar 18, 2015 659  set_num_sets_(num);  Alexandre Duret-Lutz committed Feb 23, 2015 660 661 662 663 664  acc_.set_acceptance(c); if (num == 0) prop_state_based_acc(); }  Alexandre Duret-Lutz committed Mar 18, 2015 665 666 667 668 669 670 671 672 673 674 675 676 677 678  /// \brief Copy the acceptance condition of another tgba. void copy_acceptance_of(const const_tgba_ptr& a) { acc_ = a->acc(); unsigned num = acc_.num_sets(); if (num == 0) prop_state_based_acc(); } void copy_ap_of(const const_tgba_ptr& a) { get_dict()->register_all_propositions_of(a, this); }  Alexandre Duret-Lutz committed Mar 18, 2015 679 680 681 682 683 684 685 686 687 688 689 690 691 692  void set_generalized_buchi(unsigned num) { set_num_sets_(num); acc_.set_generalized_buchi(); if (num == 0) prop_state_based_acc(); } acc_cond::mark_t set_buchi() { set_generalized_buchi(1); return acc_.mark(0); }  Alexandre Duret-Lutz committed Feb 23, 2015 693  protected:  Alexandre Duret-Lutz committed Jul 17, 2003 694 695 696  /// Do the actual computation of tgba::support_conditions(). virtual bdd compute_support_conditions(const state* state) const = 0; mutable const state* last_support_conditions_input_;  Alexandre Duret-Lutz committed Mar 31, 2011 697 698  private: mutable bdd last_support_conditions_output_;  Alexandre Duret-Lutz committed Aug 15, 2014 699 700 701 702 703 704 705 706 707 708  protected: // Boolean properties. Beware: true means that the property // holds, but false means the property is unknown. struct bprop { bool state_based_acc:1; // State-based acceptance. bool inherently_weak:1; // Weak automaton. bool deterministic:1; // Deterministic automaton.  Alexandre Duret-Lutz committed Feb 28, 2015 709  bool stutter_inv:1; // Stutter invariant  Alexandre Duret-Lutz committed Aug 15, 2014 710 711 712 713 714 715 716  }; union { unsigned props; bprop is; };  Alexandre Duret-Lutz committed Oct 08, 2014 717 718 719 720 721 722 #ifndef SWIG // Dynamic properties, are given with a name and a destructor function. std::unordered_map>> named_prop_; #endif  Alexandre Duret-Lutz committed Dec 09, 2014 723 724  void* get_named_prop_(std::string s) const;  Alexandre Duret-Lutz committed Aug 15, 2014 725 726  public:  Alexandre Duret-Lutz committed Oct 08, 2014 727 728 729 #ifndef SWIG void set_named_prop(std::string s, void* val, std::function destructor);  Alexandre Duret-Lutz committed Dec 09, 2014 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744  template void set_named_prop(std::string s, T* val) { set_named_prop(s, val, [](void *p) { delete static_cast(p); }); } template T* get_named_prop(std::string s) const { void* p = get_named_prop_(s); if (!p) return nullptr; return static_cast(p); }  Alexandre Duret-Lutz committed Oct 08, 2014 745 746 #endif  Alexandre Duret-Lutz committed Aug 15, 2014 747 748 749 750 751 752 753 754 755 756 757 758  bool has_state_based_acc() const { return is.state_based_acc; } void prop_state_based_acc(bool val = true) { is.state_based_acc = val; } bool is_sba() const {  Alexandre Duret-Lutz committed Mar 18, 2015 759  return has_state_based_acc() && acc().is_buchi();  Alexandre Duret-Lutz committed Aug 15, 2014 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781  } bool is_inherently_weak() const { return is.inherently_weak; } void prop_inherently_weak(bool val = true) { is.inherently_weak = val; } bool is_deterministic() const { return is.deterministic; } void prop_deterministic(bool val = true) { is.deterministic = val; }  Alexandre Duret-Lutz committed Feb 28, 2015 782 783 784 785 786 787 788 789 790 791  bool is_stutter_invariant() const { return is.stutter_inv; } void prop_stutter_invariant(bool val = true) { is.stutter_inv = val; }  Alexandre Duret-Lutz committed Jan 03, 2015 792  struct prop_set  Alexandre Duret-Lutz committed Aug 15, 2014 793  {  Alexandre Duret-Lutz committed Jan 03, 2015 794 795 796  bool state_based; bool inherently_weak; bool deterministic;  Alexandre Duret-Lutz committed Feb 28, 2015 797  bool stutter_inv;  Alexandre Duret-Lutz committed Jan 03, 2015 798 799 800  static prop_set all() {  Alexandre Duret-Lutz committed Mar 18, 2015 801  return { true, true, true, true };  Alexandre Duret-Lutz committed Jan 03, 2015 802 803 804 805 806 807 808 809  } }; // There is no default value here on purpose. This way any time we // add a new property we have to update every call to prop_copy(). void prop_copy(const const_tgba_ptr& other, prop_set p) { if (p.state_based)  Alexandre Duret-Lutz committed Aug 15, 2014 810  prop_state_based_acc(other->has_state_based_acc());  Alexandre Duret-Lutz committed Jan 03, 2015 811  if (p.inherently_weak)  Alexandre Duret-Lutz committed Aug 15, 2014 812  prop_inherently_weak(other->is_inherently_weak());  Alexandre Duret-Lutz committed Jan 03, 2015 813  if (p.deterministic)  Alexandre Duret-Lutz committed Aug 15, 2014 814  prop_deterministic(other->is_deterministic());  Alexandre Duret-Lutz committed Feb 28, 2015 815 816  if (p.stutter_inv) prop_stutter_invariant(other->is_stutter_invariant());  Alexandre Duret-Lutz committed Aug 15, 2014 817 818  }  Alexandre Duret-Lutz committed Jan 03, 2015 819 820 821 822 823 824 825 826 827 828  void prop_keep(prop_set p) { if (!p.state_based) prop_state_based_acc(false); if (!p.inherently_weak) prop_inherently_weak(false); if (!p.deterministic) prop_deterministic(false); }  Alexandre Duret-Lutz committed May 28, 2003 829  };  Alexandre Duret-Lutz committed May 26, 2003 830   Alexandre Duret-Lutz committed Nov 16, 2004 831 832 833 834 835  /// \addtogroup tgba_representation TGBA representations /// \ingroup tgba /// \addtogroup tgba_algorithms TGBA algorithms /// \ingroup tgba  Alexandre Duret-Lutz committed Nov 17, 2004 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853  /// \addtogroup tgba_on_the_fly_algorithms TGBA on-the-fly algorithms /// \ingroup tgba_algorithms /// \addtogroup tgba_io Input/Output of TGBA /// \ingroup tgba_algorithms /// \addtogroup tgba_ltl Translating LTL formulae into TGBA /// \ingroup tgba_algorithms /// \addtogroup tgba_generic Algorithm patterns /// \ingroup tgba_algorithms /// \addtogroup tgba_reduction TGBA simplifications /// \ingroup tgba_algorithms /// \addtogroup tgba_misc Miscellaneous algorithms on TGBA /// \ingroup tgba_algorithms  Alexandre Duret-Lutz committed May 26, 2003 854 }  Alexandre Duret-Lutz committed May 26, 2003 855 856  #endif // SPOT_TGBA_TGBA_HH