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/********************* */
/*! \file expand_definitions.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 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 module for processing assertions for an SMT engine.
**/
#include "cvc4_private.h"
#ifndef CVC4__SMT__EXPAND_DEFINITIONS_H
#define CVC4__SMT__EXPAND_DEFINITIONS_H
#include <unordered_map>
#include "expr/node.h"
#include "expr/term_conversion_proof_generator.h"
#include "preprocessing/assertion_pipeline.h"
#include "smt/smt_engine_stats.h"
#include "util/resource_manager.h"
namespace CVC4 {
class SmtEngine;
namespace smt {
/**
* 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(SmtEngine& smt, ResourceManager& rm, 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
* @param expandOnly if true, then the expandDefinitions function of
* TheoryEngine is not called on subterms of n.
* @return The expanded term.
*/
Node expandDefinitions(
TNode n,
std::unordered_map<Node, Node, NodeHashFunction>& cache,
bool expandOnly = false);
/**
* Expand defintitions in assertions. This applies this above method to each
* assertion in the given pipeline.
*/
void expandAssertions(preprocessing::AssertionPipeline& assertions,
bool expandOnly = false);
/**
* 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, NodeHashFunction>& cache,
bool expandOnly,
TConvProofGenerator* tpg);
/** Reference to the SMT engine */
SmtEngine& d_smt;
/** Reference to resource manager */
ResourceManager& d_resourceManager;
/** Reference to the SMT stats */
SmtEngineStatistics& d_smtStats;
/** A proof generator for the term conversion. */
std::unique_ptr<TConvProofGenerator> d_tpg;
};
} // namespace smt
} // namespace CVC4
#endif
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