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/********************* */
/*! \file theory_sets.h
** \verbatim
** Top contributors (to current version):
** Tim King, Kshitij Bansal, 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 Sets theory.
**
** Sets theory.
**/
#include "cvc4_private.h"
#ifndef CVC4__THEORY__SETS__THEORY_SETS_H
#define CVC4__THEORY__SETS__THEORY_SETS_H
#include <memory>
#include "theory/theory.h"
#include "theory/uf/equality_engine.h"
namespace CVC4 {
namespace theory {
namespace sets {
class TheorySetsPrivate;
class TheorySetsScrutinize;
class TheorySets : public Theory
{
friend class TheorySetsPrivate;
friend class TheorySetsRels;
public:
/** Constructs a new instance of TheorySets w.r.t. the provided contexts. */
TheorySets(context::Context* c,
context::UserContext* u,
OutputChannel& out,
Valuation valuation,
const LogicInfo& logicInfo,
ProofNodeManager* pnm);
~TheorySets() override;
//--------------------------------- initialization
/** get the official theory rewriter of this theory */
TheoryRewriter* getTheoryRewriter() override;
/**
* Returns true if we need an equality engine. If so, we initialize the
* information regarding how it should be setup. For details, see the
* documentation in Theory::needsEqualityEngine.
*/
bool needsEqualityEngine(EeSetupInfo& esi) override;
/** finish initialization */
void finishInit() override;
//--------------------------------- end initialization
void addSharedTerm(TNode) override;
void check(Effort) override;
bool collectModelInfo(TheoryModel* m) override;
void computeCareGraph() override;
TrustNode explain(TNode) override;
EqualityStatus getEqualityStatus(TNode a, TNode b) override;
Node getModelValue(TNode) override;
std::string identify() const override { return "THEORY_SETS"; }
void preRegisterTerm(TNode node) override;
TrustNode expandDefinition(Node n) override;
PPAssertStatus ppAssert(TNode in, SubstitutionMap& outSubstitutions) override;
void presolve() override;
void propagate(Effort) override;
bool isEntailed(Node n, bool pol);
private:
/** Functions to handle callbacks from equality engine */
class NotifyClass : public eq::EqualityEngineNotify
{
public:
NotifyClass(TheorySetsPrivate& theory) : d_theory(theory) {}
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;
private:
TheorySetsPrivate& d_theory;
};
/** The internal theory */
std::unique_ptr<TheorySetsPrivate> d_internal;
/** Instance of the above class */
NotifyClass d_notify;
}; /* class TheorySets */
}/* CVC4::theory::sets namespace */
}/* CVC4::theory namespace */
}/* CVC4 namespace */
#endif /* CVC4__THEORY__SETS__THEORY_SETS_H */
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