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/********************* */
/*! \file arith_rewriter.h
** \verbatim
** Original author: Tim King
** Major contributors: Morgan Deters, Dejan Jovanovic
** Minor contributors (to current version): none
** 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 Rewriter for arithmetic.
**
** Rewriter for the theory of arithmetic. This rewrites to the normal form for
** arithmetic. See theory/arith/normal_form.h for more information.
**/
#include "cvc4_private.h"
#ifndef __CVC4__THEORY__ARITH__ARITH_REWRITER_H
#define __CVC4__THEORY__ARITH__ARITH_REWRITER_H
#include "theory/theory.h"
#include "theory/rewriter.h"
namespace CVC4 {
namespace theory {
namespace arith {
class ArithRewriter {
public:
static RewriteResponse preRewrite(TNode n);
static RewriteResponse postRewrite(TNode n);
static void init() { }
static void shutdown() { }
private:
static Node makeSubtractionNode(TNode l, TNode r);
static Node makeUnaryMinusNode(TNode n);
static RewriteResponse preRewriteTerm(TNode t);
static RewriteResponse postRewriteTerm(TNode t);
static RewriteResponse rewriteVariable(TNode t);
static RewriteResponse rewriteConstant(TNode t);
static RewriteResponse rewriteMinus(TNode t, bool pre);
static RewriteResponse rewriteUMinus(TNode t, bool pre);
static RewriteResponse rewriteDiv(TNode t, bool pre);
static RewriteResponse rewriteIntsDivModTotal(TNode t, bool pre);
static RewriteResponse preRewritePlus(TNode t);
static RewriteResponse postRewritePlus(TNode t);
static RewriteResponse preRewriteMult(TNode t);
static RewriteResponse postRewriteMult(TNode t);
static RewriteResponse preRewriteAtom(TNode t);
static RewriteResponse postRewriteAtom(TNode t);
static bool isAtom(TNode n);
static inline bool isTerm(TNode n) {
return !isAtom(n);
}
};/* class ArithRewriter */
}/* CVC4::theory::arith namespace */
}/* CVC4::theory namespace */
}/* CVC4 namespace */
#endif /* __CVC4__THEORY__ARITH__ARITH_REWRITER_H */
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