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/******************************************************************************
* Top contributors (to current version):
* 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.
* ****************************************************************************
*
* The module for processing assertions for an SMT engine.
*/
#include "cvc5_private.h"
#ifndef CVC5__SMT__EXPAND_DEFINITIONS_H
#define CVC5__SMT__EXPAND_DEFINITIONS_H
#include <unordered_map>
#include "expr/node.h"
#include "theory/trust_node.h"
namespace cvc5 {
class Env;
class ProofNodeManager;
class TConvProofGenerator;
namespace smt {
struct SmtEngineStatistics;
/**
* Module in charge of expanding definitions for an SMT engine.
*
* Its main features is expandDefinitions(TNode, ...), which returns the
* expanded formula of a term.
*/
class ExpandDefs
{
public:
ExpandDefs(Env& env, SmtEngineStatistics& stats);
~ExpandDefs();
/**
* Expand definitions in term n. Return the expanded form of n.
*
* @param n The node to expand
* @param cache Cache of previous results
* @return The expanded term.
*/
Node expandDefinitions(TNode n, std::unordered_map<Node, Node>& cache);
/**
* Set proof node manager, which signals this class to enable proofs using the
* given proof node manager.
*/
void setProofNodeManager(ProofNodeManager* pnm);
private:
/**
* Helper function for above, called to specify if we want proof production
* based on the optional argument tpg.
*/
theory::TrustNode expandDefinitions(TNode n,
std::unordered_map<Node, Node>& cache,
TConvProofGenerator* tpg);
/** Reference to the environment. */
Env& d_env;
/** Reference to the SMT stats */
SmtEngineStatistics& d_smtStats;
/** A proof generator for the term conversion. */
std::unique_ptr<TConvProofGenerator> d_tpg;
};
} // namespace smt
} // namespace cvc5
#endif
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