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/********************* */
/*! \file inst_strategy.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds, Morgan Deters, Mathias Preiner
** This file is part of the CVC4 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.\endverbatim
**
** \brief Instantiation engine strategy base class
**/
#include "cvc4_private.h"
#ifndef CVC4__THEORY__QUANTIFIERS__INST_STRATEGY_H
#define CVC4__THEORY__QUANTIFIERS__INST_STRATEGY_H
#include <vector>
#include "expr/node.h"
#include "options/quantifiers_options.h"
#include "theory/theory.h"
namespace CVC4 {
namespace theory {
namespace quantifiers {
namespace inst {
class TriggerDatabase;
}
class QuantifiersState;
class QuantifiersInferenceManager;
class QuantifiersRegistry;
class TermRegistry;
/** A status response to process */
enum class InstStrategyStatus
{
// the strategy is not finished
STATUS_UNFINISHED,
// the status of the strategy is unknown
STATUS_UNKNOWN,
};
/**
* A base class for instantiation strategies within E-matching.
*/
class InstStrategy
{
public:
InstStrategy(inst::TriggerDatabase& td,
QuantifiersState& qs,
QuantifiersInferenceManager& qim,
QuantifiersRegistry& qr,
TermRegistry& tr);
virtual ~InstStrategy();
/** presolve */
virtual void presolve();
/** reset instantiation */
virtual void processResetInstantiationRound(Theory::Effort effort) = 0;
/** process method, returns a status */
virtual InstStrategyStatus process(Node f, Theory::Effort effort, int e) = 0;
/** identify */
virtual std::string identify() const;
protected:
/**
* Get the current user pat mode, which may be interleaved based on counters
* maintained by the quantifiers state.
*/
options::UserPatMode getInstUserPatMode() const;
/** reference to the trigger database */
inst::TriggerDatabase& d_td;
/** The quantifiers state object */
QuantifiersState& d_qstate;
/** The quantifiers inference manager object */
QuantifiersInferenceManager& d_qim;
/** Reference to the quantifiers registry */
QuantifiersRegistry& d_qreg;
/** Reference to the term registry */
TermRegistry& d_treg;
}; /* class InstStrategy */
} // namespace quantifiers
} // namespace theory
} // namespace CVC4
#endif /* CVC4__THEORY__QUANTIFIERS__INSTANTIATION_ENGINE_H */
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