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/********************* */
/*! \file lazy_proof.h
** \verbatim
** Top contributors (to current version):
** 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 Lazy proof utility
**/
#include "cvc4_private.h"
#ifndef CVC4__EXPR__LAZY_PROOF_H
#define CVC4__EXPR__LAZY_PROOF_H
#include <unordered_map>
#include <vector>
#include "expr/proof.h"
#include "expr/proof_generator.h"
#include "expr/proof_node_manager.h"
namespace CVC4 {
/**
* A (context-dependent) lazy proof.
*/
class LazyCDProof : public CDProof
{
public:
LazyCDProof(ProofNodeManager* pnm,
ProofGenerator* dpg = nullptr,
context::Context* c = nullptr);
~LazyCDProof();
/**
* Get lazy proof for fact, or nullptr if it does not exist. This may
* additionally proof generators to generate proofs for ASSUME nodes that
* don't yet have a concrete proof.
*/
std::shared_ptr<ProofNode> mkProof(Node fact) override;
/** Add step by generator
*
* This asserts that expected can be proven by proof generator pg if
* it is required to do so.
*/
void addLazyStep(Node expected,
ProofGenerator* pg,
bool forceOverwrite = false);
/** Does this have any proof generators? */
bool hasGenerators() const;
/** Does the given fact have a generator? */
bool hasGenerator(Node fact) const;
protected:
typedef context::CDHashMap<Node, ProofGenerator*, NodeHashFunction>
NodeProofGeneratorMap;
/** Maps facts that can be proven to generators */
NodeProofGeneratorMap d_gens;
/** The default proof generator */
ProofGenerator* d_defaultGen;
/** Get generator for fact, or nullptr if it doesnt exist */
ProofGenerator* getGeneratorFor(Node fact, bool& isSym);
};
} // namespace CVC4
#endif /* CVC4__EXPR__LAZY_PROOF_H */
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