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/********************* */
/*! \file term_enumeration.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds, 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 utilities for term enumeration
**/
#include "cvc4_private.h"
#ifndef CVC4__THEORY__QUANTIFIERS__TERM_ENUMERATION_H
#define CVC4__THEORY__QUANTIFIERS__TERM_ENUMERATION_H
#include <unordered_map>
#include <vector>
#include "expr/node.h"
#include "expr/type_node.h"
#include "theory/type_enumerator.h"
namespace CVC5 {
namespace theory {
namespace quantifiers {
class QuantifiersBoundInference;
/** Term enumeration
*
* This class has utilities for enumerating terms. It stores
* a cache of terms enumerated per each type.
* It also has various utility functions regarding type
* enumeration.
*/
class TermEnumeration
{
public:
TermEnumeration(QuantifiersBoundInference* qbi = nullptr);
~TermEnumeration() {}
/** get i^th term for type tn */
Node getEnumerateTerm(TypeNode tn, unsigned i);
/** get domain
*
* If tn is a type such that d_qbi.mayComplete(tn) returns true, this method
* adds all domain elements of tn to dom and returns true. Otherwise, this
* method returns false.
*/
bool getDomain(TypeNode tn, std::vector<Node>& dom);
private:
/**
* Reference to quantifiers bound inference, which determines when it is
* possible to enumerate the entire domain of a type. If this is not provided,
* getDomain above always returns false.
*/
QuantifiersBoundInference* d_qbi;
/** ground terms enumerated for types */
std::unordered_map<TypeNode, std::vector<Node>, TypeNodeHashFunction>
d_enum_terms;
/** map from type to the index of its type enumerator in d_typ_enum. */
std::unordered_map<TypeNode, size_t, TypeNodeHashFunction> d_typ_enum_map;
/** type enumerators */
std::vector<TypeEnumerator> d_typ_enum;
};
} // namespace quantifiers
} // namespace theory
} // namespace CVC5
#endif /* CVC4__THEORY__QUANTIFIERS__TERM_ENUMERATION_H */
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