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/******************************************************************************
* Top contributors (to current version):
* Haniel Barbosa, Mathias Preiner
*
* 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.
* ****************************************************************************
*
* The NlExtPurify preprocessing pass.
*
* Purifies non-linear terms by replacing sums under multiplications by fresh
* variables.
*/
#include "cvc5_private.h"
#ifndef CVC5__PREPROCESSING__PASSES__NL_EXT_PURIFY_H
#define CVC5__PREPROCESSING__PASSES__NL_EXT_PURIFY_H
#include <unordered_map>
#include <vector>
#include "expr/node.h"
#include "preprocessing/preprocessing_pass.h"
namespace cvc5 {
namespace preprocessing {
namespace passes {
using NodeMap = std::unordered_map<Node, Node>;
class NlExtPurify : public PreprocessingPass
{
public:
NlExtPurify(PreprocessingPassContext* preprocContext);
protected:
PreprocessingPassResult applyInternal(
AssertionPipeline* assertionsToPreprocess) override;
private:
Node purifyNlTerms(TNode n,
NodeMap& cache,
NodeMap& bcache,
std::vector<Node>& var_eq,
bool beneathMult = false);
};
} // namespace passes
} // namespace preprocessing
} // namespace cvc5
#endif /* CVC5__PREPROCESSING__PASSES__NL_EXT_PURIFY_H */
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