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/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds
*
* 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.
* ****************************************************************************
*
* Equality engine manager for central equality engine architecture
*/
#include "cvc5_private.h"
#ifndef CVC5__THEORY__EE_MANAGER_CENTRAL__H
#define CVC5__THEORY__EE_MANAGER_CENTRAL__H
#include <map>
#include <memory>
#include "theory/ee_manager.h"
#include "theory/quantifiers/master_eq_notify.h"
#include "theory/uf/equality_engine.h"
namespace cvc5 {
namespace theory {
/**
* The (central) equality engine manager. This encapsulates an architecture
* in which all applicable theories use a single central equality engine.
*
* This class is not responsible for actually initializing equality engines in
* theories (since this class does not have access to the internals of Theory).
* Instead, it is only responsible for the construction of the equality
* engine objects themselves. TheoryEngine is responsible for querying this
* class during finishInit() to determine the equality engines to pass to each
* theories based on getEeTheoryInfo.
*
* It also may allocate a "master" equality engine, which is intuitively the
* equality engine of the theory of quantifiers. If all theories use the
* central equality engine, then the master equality engine is the same as the
* central equality engine.
*
* The theories that use central equality engine are determined by
* Theory::usesCentralEqualityEngine.
*
* The main idea behind this class is to use a notification class on the
* central equality engine which dispatches *multiple* notifications to the
* theories that use the central equality engine.
*/
class EqEngineManagerCentral : public EqEngineManager
{
public:
EqEngineManagerCentral(Env& env, TheoryEngine& te, SharedSolver& shs);
~EqEngineManagerCentral();
/**
* Initialize theories. This method allocates unique equality engines
* per theories and connects them to a master equality engine.
*/
void initializeTheories() override;
/** Notify this class that we are building the model. */
void notifyBuildingModel();
private:
/**
* Notify class for central equality engine. This class dispatches
* notifications from the central equality engine to the appropriate
* theory(s).
*/
class CentralNotifyClass : public theory::eq::EqualityEngineNotify
{
public:
CentralNotifyClass(EqEngineManagerCentral& eemc);
bool eqNotifyTriggerPredicate(TNode predicate, bool value) override;
bool eqNotifyTriggerTermEquality(TheoryId tag,
TNode t1,
TNode t2,
bool value) override;
void eqNotifyConstantTermMerge(TNode t1, TNode t2) override;
void eqNotifyNewClass(TNode t) override;
void eqNotifyMerge(TNode t1, TNode t2) override;
void eqNotifyDisequal(TNode t1, TNode t2, TNode reason) override;
/** Parent */
EqEngineManagerCentral& d_eemc;
/** List of notify classes that need new class notification */
std::vector<eq::EqualityEngineNotify*> d_newClassNotify;
/** List of notify classes that need merge notification */
std::vector<eq::EqualityEngineNotify*> d_mergeNotify;
/** List of notify classes that need disequality notification */
std::vector<eq::EqualityEngineNotify*> d_disequalNotify;
/** The model notify class */
eq::EqualityEngineNotify* d_mNotify;
/** The quantifiers engine */
QuantifiersEngine* d_quantEngine;
};
/** Notification when predicate gets value in central equality engine */
bool eqNotifyTriggerPredicate(TNode predicate, bool value);
bool eqNotifyTriggerTermEquality(TheoryId tag,
TNode t1,
TNode t2,
bool value);
/** Notification when constants are merged in central equality engine */
void eqNotifyConstantTermMerge(TNode t1, TNode t2);
/** The master equality engine notify class */
std::unique_ptr<quantifiers::MasterNotifyClass> d_masterEENotify;
/** The master equality engine. */
eq::EqualityEngine* d_masterEqualityEngine;
/** The master equality engine, if we allocated it */
std::unique_ptr<eq::EqualityEngine> d_masterEqualityEngineAlloc;
/** The central equality engine notify class */
CentralNotifyClass d_centralEENotify;
/** The central equality engine. */
eq::EqualityEngine d_centralEqualityEngine;
/** The proof equality engine for the central equality engine */
std::unique_ptr<eq::ProofEqEngine> d_centralPfee;
/**
* A table of from theory IDs to notify classes.
*/
eq::EqualityEngineNotify* d_theoryNotify[theory::THEORY_LAST];
};
} // namespace theory
} // namespace cvc5
#endif /* CVC5__THEORY__EE_MANAGER_CENTRAL__H */
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