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/****************************************************************************** |
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* Top contributors (to current version): |
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* Haniel Barbosa, Mathias Preiner |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* The NlExtPurify preprocessing pass. |
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* |
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* Purifies non-linear terms by replacing sums under multiplications by fresh |
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* variables. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__PREPROCESSING__PASSES__NL_EXT_PURIFY_H |
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#define CVC5__PREPROCESSING__PASSES__NL_EXT_PURIFY_H |
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#include <unordered_map> |
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#include <vector> |
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#include "expr/node.h" |
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#include "preprocessing/preprocessing_pass.h" |
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namespace cvc5 { |
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namespace preprocessing { |
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namespace passes { |
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using NodeMap = std::unordered_map<Node, Node>; |
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class NlExtPurify : public PreprocessingPass |
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{ |
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public: |
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NlExtPurify(PreprocessingPassContext* preprocContext); |
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protected: |
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PreprocessingPassResult applyInternal( |
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AssertionPipeline* assertionsToPreprocess) override; |
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private: |
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Node purifyNlTerms(TNode n, |
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NodeMap& cache, |
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NodeMap& bcache, |
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std::vector<Node>& var_eq, |
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bool beneathMult = false); |
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}; |
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} // namespace passes |
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} // namespace preprocessing |
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} // namespace cvc5 |
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#endif /* CVC5__PREPROCESSING__PASSES__NL_EXT_PURIFY_H */ |