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/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2021 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.
* ****************************************************************************
*
* Preprocess equality rewriter for arithmetic
*/
#include "cvc5_private.h"
#ifndef CVC5__THEORY__ARITH__PP_REWRITE_EQ__H
#define CVC5__THEORY__ARITH__PP_REWRITE_EQ__H
#include "context/context.h"
#include "expr/node.h"
#include "proof/eager_proof_generator.h"
#include "proof/proof_node_manager.h"
namespace cvc5 {
namespace theory {
namespace arith {
/**
* This class is responsible for rewriting arithmetic equalities based on the
* current options.
*
* In particular, we may rewrite (= x y) to (and (>= x y) (<= x y)).
*/
class PreprocessRewriteEq
{
public:
PreprocessRewriteEq(context::Context* c, ProofNodeManager* pnm);
~PreprocessRewriteEq() {}
/**
* Preprocess equality, applies ppRewrite for equalities. This method is
* distinct from ppRewrite since it is not allowed to construct lemmas.
*/
TrustNode ppRewriteEq(TNode eq);
private:
/** Are proofs enabled? */
bool proofsEnabled() const;
/** Used to prove pp-rewrites */
EagerProofGenerator d_ppPfGen;
/** Proof node manager */
ProofNodeManager* d_pnm;
};
} // namespace arith
} // namespace theory
} // namespace cvc5
#endif
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