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/******************************************************************************
* Top contributors (to current version):
* Haniel Barbosa, 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.
* ****************************************************************************
*
* A proof generator for buffered proof steps.
*/
#include "cvc5_private.h"
#ifndef CVC5__PROOF__BUFFERED_PROOF_GENERATOR_H
#define CVC5__PROOF__BUFFERED_PROOF_GENERATOR_H
#include "context/cdhashmap.h"
#include "proof/proof_generator.h"
namespace cvc5 {
class ProofNodeManager;
class ProofStep;
/**
* The proof generator for buffered steps. This class is a context-dependent
* mapping from formulas to proof steps. It does not generate ProofNodes until
* it is asked to provide a proof for a given fact.
*/
class BufferedProofGenerator : public ProofGenerator
{
typedef context::CDHashMap<Node, std::shared_ptr<ProofStep>> NodeProofStepMap;
public:
BufferedProofGenerator(context::Context* c, ProofNodeManager* pnm);
~BufferedProofGenerator() {}
/** add step
* Unless the overwrite policy is ALWAYS it does not replace previously
* registered steps (modulo (dis)equality symmetry).
*/
bool addStep(Node fact,
ProofStep ps,
CDPOverwrite opolicy = CDPOverwrite::NEVER);
/** Get proof for. It is robust to (dis)equality symmetry. */
std::shared_ptr<ProofNode> getProofFor(Node f) override;
/** Whether a step has been registered for f. */
bool hasProofFor(Node f) override;
/** identify */
std::string identify() const override { return "BufferedProofGenerator"; }
private:
/** maps expected to ProofStep */
NodeProofStepMap d_facts;
/** the proof node manager */
ProofNodeManager* d_pnm;
};
} // namespace cvc5
#endif /* CVC5__PROOF__BUFFERED_PROOF_GENERATOR_H */
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