/*********************                                                        */
/*! \file constraint_forward.h
 ** \verbatim
 ** Top contributors (to current version):
 **   Tim King
 ** This file is part of the CVC4 project.
 ** Copyright (c) 2009-2019 by the authors listed in the file AUTHORS
 ** in the top-level source directory) and their institutional affiliations.
 ** All rights reserved.  See the file COPYING in the top-level source
 ** directory for licensing information.\endverbatim
 **
 ** \brief Forward declarations of the ConstraintValue and ConstraintDatabase classes.
 **
 ** This is the forward declarations of the ConstraintValue and ConstraintDatabase
 ** and the typedef for Constraint.  This is used to break circular dependencies and
 ** minimize interaction between header files.
 **/

#ifndef __CVC4__THEORY__ARITH__CONSTRAINT_FORWARD_H
#define __CVC4__THEORY__ARITH__CONSTRAINT_FORWARD_H

#include "cvc4_private.h"
#include <vector>

namespace CVC4 {
namespace theory {
namespace arith {

class Constraint;
typedef Constraint* ConstraintP;
typedef const Constraint* ConstraintCP;

static const ConstraintP NullConstraint = NULL;

class ConstraintDatabase;

typedef std::vector<ConstraintCP> ConstraintCPVec;

typedef std::vector<Rational> RationalVector;
typedef RationalVector* RationalVectorP;
typedef const RationalVector* RationalVectorCP;
static const RationalVectorCP RationalVectorCPSentinel = NULL;
static const RationalVectorP RationalVectorPSentinel = NULL;

}/* CVC4::theory::arith namespace */
}/* CVC4::theory namespace */
}/* CVC4 namespace */

#endif /* __CVC4__THEORY__ARITH__CONSTRAINT_FORWARD_H */