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/********************* */
/*! \file theory_preprocessor.h
** \verbatim
** Top contributors (to current version):
** Dejan Jovanovic, Morgan Deters, Andrew Reynolds
** This file is part of the CVC4 project.
** Copyright (c) 2009-2019 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.\endverbatim
**
** \brief The theory preprocessor.
**/
#include "cvc4_private.h"
#ifndef CVC4__THEORY__THEORY_PREPROCESSOR_H
#define CVC4__THEORY__THEORY_PREPROCESSOR_H
#include <unordered_map>
#include "expr/node.h"
#include "preprocessing/assertion_pipeline.h"
namespace CVC4 {
class LogicInfo;
class TheoryEngine;
class RemoveTermFormulas;
class LazyCDProof;
namespace theory {
/**
* The preprocessor used in TheoryEngine.
*/
class TheoryPreprocessor
{
typedef std::unordered_map<Node, Node, NodeHashFunction> NodeMap;
public:
/** Constructs a theory preprocessor */
TheoryPreprocessor(TheoryEngine& engine, RemoveTermFormulas& tfr);
/** Destroys a theory preprocessor */
~TheoryPreprocessor();
/** Clear the cache of this class */
void clearCache();
/**
* Preprocesses node and stores it along with lemmas generated by
* preprocessing into the assertion pipeline lemmas. The (optional) argument
* lcp is the proof that stores a proof of all top-level formulas in lemmas,
* assuming that lcp initially contains a proof of node. The flag
* doTheoryPreprocess is whether we should run theory-specific preprocessing.
*/
void preprocess(TNode node,
preprocessing::AssertionPipeline& lemmas,
bool doTheoryPreprocess);
/**
* Runs theory specific preprocessing on the non-Boolean parts of
* the formula. This is only called on input assertions, after ITEs
* have been removed.
*/
Node theoryPreprocess(TNode node);
private:
/** Reference to owning theory engine */
TheoryEngine& d_engine;
/** Logic info of theory engine */
const LogicInfo& d_logicInfo;
/** Cache for theory-preprocessing of assertions */
NodeMap d_ppCache;
/** The term formula remover */
RemoveTermFormulas& d_tfr;
/** Helper for theoryPreprocess */
Node ppTheoryRewrite(TNode term);
};
} // namespace theory
} // namespace CVC4
#endif /* CVC4__THEORY__THEORY_PREPROCESSOR_H */
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