boolterm.hh

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#ifndef __RVLALG_BOOL_TERMINATOR
#define __RVLALG_BOOL_TERMINATOR

#include "alg.hh"

namespace RVLAlg {

  class BoolTerminator: public Terminator {
  private:
    bool & ans;
  public:
    BoolTerminator(bool & _ans): ans(_ans) {}
    BoolTerminator(BoolTerminator & bt): ans(bt.ans) {}
    ~BoolTerminator() {}
    bool query() { return ans; }
  };

  class AndTerminator: public Terminator {
  public:
    
    AndTerminator( Terminator &a, Terminator &b): first(a), second(b){}
    ~AndTerminator() {}
    
    virtual bool query() { 
      return (first.query() && second.query());
    }
    
  protected:
    Terminator & first;
    Terminator & second;
    
  };
  
  class OrTerminator: public Terminator {
  public:

    OrTerminator( Terminator &a, Terminator &b): first(a), second(b){}
    ~OrTerminator() {}

    virtual bool query() { 
      return (first.query() || second.query());
    }

  protected:
    Terminator & first;
    Terminator & second;
  };

  class NotTerminator: public Terminator {
  public:

    NotTerminator( Terminator &a): first(a){}
    ~NotTerminator() {}

    virtual bool query() { 
      return (!first.query()); 
    }

  protected:
    Terminator & first;
  };

  class XorTerminator: public Terminator {
  public:

    XorTerminator( Terminator &a, Terminator &b): first(a), second(b){}
    ~XorTerminator() {}

    virtual bool query() {
      bool A = first.query();
      bool B = second.query();

      return ((A || B) && (!(A && B)));
    }

  protected:
    Terminator & first;
    Terminator & second;
  };

}

#endif

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