kripke.hh

// -*- coding: utf-8 -*-
// Copyright (C) by the Spot authors, see the AUTHORS file for details.
//
// 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
// the Free Software Foundation; either version 3 of the License, or
// (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
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
#pragma once
 
#include <spot/kripke/fairkripke.hh>
#include <spot/twacube/cube.hh>
#include <memory>
#include <type_traits>
 
namespace spot
{
  template<typename State, typename SuccIterator>
  class SPOT_API kripkecube:
    public std::enable_shared_from_this<kripkecube<State, SuccIterator>>
  {
  public:
    State initial(unsigned tid);

    unsigned get_threads();

    std::string to_string(const State, unsigned tid) const;

    SuccIterator* succ(const State, unsigned tid);

    void recycle(SuccIterator*, unsigned tid);

    const std::vector<std::string> ap();
  };
 
#ifndef SWIG

  template <typename T, typename State, typename SuccIter>
  class SPOT_API is_a_kripkecube_ptr
  {
  private:
    using yes = std::true_type;
    using no = std::false_type;
 
    // Hardly waiting C++ concepts...
    template<typename U, typename V> static auto test_kripke(U u, V v)
      -> decltype(
       // Check the kripke
       std::is_same<State,       decltype(u->initial(0))>::value            &&
       std::is_same<unsigned,    decltype(u->get_threads())>::value         &&
       std::is_same<std::string, decltype(u->to_string(State(), 0))>::value &&
       std::is_same<SuccIter*,   decltype(u->succ(State(), 0))>::value      &&
       std::is_same<void,        decltype(u->recycle(nullptr, 0))>::value   &&
       std::is_same<const std::vector<std::string>,
                                 decltype(u->ap())>::value                  &&
       std::is_same<void,        decltype(u->recycle(nullptr, 0))>::value   &&
 
       // Check the SuccIterator
       std::is_same<void,        decltype(v->next())>::value                &&
       std::is_same<bool,        decltype(v->done())>::value                &&
       std::is_same<State,       decltype(v->state())>::value               &&
       std::is_same<spot::cube,  decltype(v->condition())>::value
 
      // finally return the type "yes"
      , yes());
 
    // For all other cases return the type "no"
    template<typename, typename> static no test_kripke(...);
 
  public:

    static constexpr bool value =
      std::is_same< decltype(test_kripke<T, SuccIter*>(nullptr, nullptr)), yes
                  >::value;
  };
 
#endif
 

  class SPOT_API kripke_succ_iterator : public twa_succ_iterator
  {
  public:
    kripke_succ_iterator(const bdd& cond)
      : cond_(cond)
    {
    }
 
    void recycle(const bdd& cond)
    {
      cond_ = cond;
    }
 
    virtual ~kripke_succ_iterator();
 
    virtual bdd cond() const override;
    virtual acc_cond::mark_t acc() const override;
  protected:
    bdd cond_;
  };

  class SPOT_API kripke: public fair_kripke
  {
  public:
    kripke(const bdd_dict_ptr& d)
      : fair_kripke(d)
      {
        prop_weak(true);
      }
 
    virtual ~kripke();
 
    virtual
      acc_cond::mark_t state_acceptance_mark(const state*) const override;
  };
 
  typedef std::shared_ptr<kripke> kripke_ptr;
  typedef std::shared_ptr<const kripke> const_kripke_ptr;
}