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/********************* */
/*! \file arithvar.h
** \verbatim
** Original author: Tim King <taking@cs.nyu.edu>
** Major contributors: none
** Minor contributors (to current version): Morgan Deters <mdeters@cs.nyu.edu>
** This file is part of the CVC4 project.
** Copyright (c) 2009-2013 New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief Defines ArithVar which is the internal representation of variables in arithmetic
**
** This defines ArithVar which is the internal representation of variables in
** arithmetic. This is a typedef from Index to ArithVar.
** This file also provides utilities for ArithVars.
**/
#include "cvc4_private.h"
#ifndef __CVC4__THEORY__ARITH__ARITHVAR_H
#define __CVC4__THEORY__ARITH__ARITHVAR_H
#include <ext/hash_map>
#include "expr/node.h"
#include "context/cdhashset.h"
#include "util/index.h"
#include "util/dense_map.h"
namespace CVC4 {
namespace theory {
namespace arith {
typedef Index ArithVar;
extern const ArithVar ARITHVAR_SENTINEL;
//Maps from Nodes -> ArithVars, and vice versa
typedef __gnu_cxx::hash_map<Node, ArithVar, NodeHashFunction> NodeToArithVarMap;
typedef DenseMap<Node> ArithVarToNodeMap;
/**
* ArithVarCallBack provides a mechanism for agreeing on callbacks while
* breaking mutual recursion inclusion order problems.
*/
class ArithVarCallBack {
public:
virtual void operator()(ArithVar x) = 0;
};
/**
* Requests arithmetic variables for internal use,
* and releases arithmetic variables that are no longer being used.
*/
class ArithVarMalloc {
public:
virtual ArithVar request() = 0;
virtual void release(ArithVar v) = 0;
};
class TNodeCallBack {
public:
virtual void operator()(TNode n) = 0;
};
class NodeCallBack {
public:
virtual void operator()(Node n) = 0;
};
class RationalCallBack {
public:
virtual Rational operator()() const = 0;
};
}/* CVC4::theory::arith namespace */
}/* CVC4::theory namespace */
}/* CVC4 namespace */
#endif /* __CVC4__THEORY__ARITH__ARITHVAR_H */
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