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/******************************************************************************
* Top contributors (to current version):
* Mudathir Mohamed, Gereon Kremer
*
* 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.
* ****************************************************************************
*
* Bags state object.
*/
#include "cvc5_private.h"
#ifndef CVC5__THEORY__BAGS__TERM_REGISTRY_H
#define CVC5__THEORY__BAGS__TERM_REGISTRY_H
#include <map>
#include "context/cdhashmap.h"
#include "expr/node.h"
namespace cvc5 {
namespace theory {
namespace bags {
class InferenceManager;
class SolverState;
/**
* Term registry, the purpose of this class is to maintain a database of
* commonly used terms, and mappings from bags to their "proxy variables".
*/
class TermRegistry
{
typedef context::CDHashMap<Node, Node, NodeHashFunction> NodeMap;
public:
TermRegistry(SolverState& state, InferenceManager& im);
/**
* Returns the existing empty bag for type tn
* or creates a new one and returns it.
**/
Node getEmptyBag(TypeNode tn);
private:
/** The inference manager */
InferenceManager& d_im;
/** Map from bag terms to their proxy variables */
NodeMap d_proxy;
/** Backwards map of above */
NodeMap d_proxy_to_term;
/** Map from types to empty bag of that type */
std::map<TypeNode, Node> d_emptybag;
}; /* class Term */
} // namespace bags
} // namespace theory
} // namespace cvc5
#endif /* CVC5__THEORY__BAGS__TERM_REGISTRY_H */
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