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/******************************************************************************
* Top contributors (to current version):
* Mudathir Mohamed, Andrew Reynolds, Gereon Kremer
*
* 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.
* ****************************************************************************
*
* Inference information utility.
*/
#include "cvc5_private.h"
#ifndef CVC5__THEORY__BAGS__INFER_INFO_H
#define CVC5__THEORY__BAGS__INFER_INFO_H
#include <map>
#include <vector>
#include "expr/node.h"
#include "theory/inference_id.h"
#include "theory/theory_inference.h"
namespace cvc5 {
namespace theory {
class TheoryInferenceManager;
namespace bags {
/**
* An inference. This is a class to track an unprocessed call to either
* send a fact, lemma, or conflict that is waiting to be asserted to the
* equality engine or sent on the output channel.
*/
class InferInfo : public TheoryInference
{
public:
InferInfo(TheoryInferenceManager* im, InferenceId id);
~InferInfo() {}
/** Process lemma */
TrustNode processLemma(LemmaProperty& p) override;
/** Pointer to the class used for processing this info */
TheoryInferenceManager* d_im;
/** The conclusion */
Node d_conclusion;
/**
* The premise(s) of the inference, interpreted conjunctively. These are
* literals that currently hold in the equality engine.
*/
std::vector<Node> d_premises;
/**
* A map of nodes to their skolem variables introduced as a result of this
* inference.
*/
std::map<Node, Node> d_skolems;
/** Is this infer info trivial? True if d_conc is true. */
bool isTrivial() const;
/**
* Does this infer info correspond to a conflict? True if d_conc is false
* and it has no new premises (d_noExplain).
*/
bool isConflict() const;
/**
* Does this infer info correspond to a "fact". A fact is an inference whose
* conclusion should be added as an equality or predicate to the equality
* engine with no new external premises (d_noExplain).
*/
bool isFact() const;
};
/**
* Writes an inference info to a stream.
*
* @param out The stream to write to
* @param ii The inference info to write to the stream
* @return The stream
*/
std::ostream& operator<<(std::ostream& out, const InferInfo& ii);
} // namespace bags
} // namespace theory
} // namespace cvc5
#endif /* CVC5__THEORY__BAGS__INFER_INFO_H */
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