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/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds, Tim King
*
* 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.
* ****************************************************************************
*
* Trigger trie class.
*/
#include "cvc4_private.h"
#ifndef CVC5__THEORY__QUANTIFIERS__TRIGGER_TRIE_H
#define CVC5__THEORY__QUANTIFIERS__TRIGGER_TRIE_H
#include <vector>
#include "expr/node.h"
#include "theory/quantifiers/ematching/trigger.h"
namespace cvc5 {
namespace theory {
namespace quantifiers {
namespace inst {
/** A trie of triggers.
*
* This class is used to cache all Trigger objects that are generated in the
* current context. We index Triggers in this data structure based on the
* value of Trigger::d_nodes. When a Trigger is added to this data structure,
* this Trie assumes responsibility for deleting it.
*/
class TriggerTrie
{
public:
TriggerTrie();
~TriggerTrie();
/**
* This returns a Trigger t that is indexed by nodes, or nullptr otherwise.
*/
Trigger* getTrigger(std::vector<Node>& nodes);
/**
* This adds t to the trie, indexed by nodes. In typical use cases, nodes i
* t->d_nodes.
*/
void addTrigger(std::vector<Node>& nodes, Trigger* t);
private:
/** The trigger at this node in the trie. */
std::vector<Trigger*> d_tr;
/** The children of this node in the trie. */
std::map<TNode, TriggerTrie> d_children;
}; /* class inst::Trigger::TriggerTrie */
} // namespace inst
} // namespace quantifiers
} // namespace theory
} // namespace cvc5
#endif /* CVC5__THEORY__QUANTIFIERS__TRIGGER_TRIE_H */
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