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/********************* */
/*! \file arith_rewriter.h
** \verbatim
** Original author: taking
** Major contributors: mdeters
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/
#include "theory/arith/arith_constants.h"
#include "theory/theory.h"
#include "theory/arith/normal_form.h"
#ifndef __CVC4__THEORY__ARITH__REWRITER_NEXT_H
#define __CVC4__THEORY__ARITH__REWRITER_NEXT_H
namespace CVC4 {
namespace theory {
namespace arith {
class NextArithRewriter{
private:
ArithConstants* d_constants;
Node makeSubtractionNode(TNode l, TNode r);
Node makeUnaryMinusNode(TNode n);
RewriteResponse preRewriteTerm(TNode t);
RewriteResponse postRewriteTerm(TNode t);
RewriteResponse rewriteVariable(TNode t);
RewriteResponse rewriteConstant(TNode t);
RewriteResponse rewriteMinus(TNode t, bool pre);
RewriteResponse rewriteUMinus(TNode t, bool pre);
RewriteResponse rewriteDivByConstant(TNode t, bool pre);
RewriteResponse preRewritePlus(TNode t);
RewriteResponse postRewritePlus(TNode t);
RewriteResponse preRewriteMult(TNode t);
RewriteResponse postRewriteMult(TNode t);
RewriteResponse preRewriteAtom(TNode t);
RewriteResponse postRewriteAtom(TNode t);
RewriteResponse postRewriteAtomConstantRHS(TNode t);
public:
NextArithRewriter(ArithConstants* ac) : d_constants(ac) {}
RewriteResponse preRewrite(TNode n);
RewriteResponse postRewrite(TNode n);
private:
bool isAtom(TNode n) const { return isRelationOperator(n.getKind()); }
bool isTerm(TNode n) const { return !isAtom(n); }
};
}; /* namesapce arith */
}; /* namespace theory */
}; /* namespace CVC4 */
#endif /* __CVC4__THEORY__ARITH__REWRITER_NEXT_H */
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