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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Basic sygus enumerator class. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__QUANTIFIERS__SYGUS_ENUMERATOR_BASIC_H |
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#define CVC5__THEORY__QUANTIFIERS__SYGUS_ENUMERATOR_BASIC_H |
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#include <map> |
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#include <unordered_set> |
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#include "expr/node.h" |
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#include "expr/type_node.h" |
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#include "theory/quantifiers/sygus/synth_conjecture.h" |
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#include "theory/quantifiers/sygus/term_database_sygus.h" |
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#include "theory/type_enumerator.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace quantifiers { |
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/** A basic sygus value generator |
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* |
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* This class is a "naive" term generator for sygus conjectures, which invokes |
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* the type enumerator to generate a stream of (all) sygus terms of a given |
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* type. |
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*/ |
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class EnumValGeneratorBasic : public EnumValGenerator |
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{ |
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public: |
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EnumValGeneratorBasic(TermDbSygus* tds, TypeNode tn); |
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~EnumValGeneratorBasic() {} |
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/** initialize (do nothing) */ |
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void initialize(Node e) override {} |
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/** initialize (do nothing) */ |
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void addValue(Node v) override { d_currTerm = *d_te; } |
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/** |
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* Get next returns the next (T-rewriter-unique) value based on the type |
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* enumerator. |
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*/ |
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bool increment() override; |
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/** get the current term */ |
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Node getCurrent() override { return d_currTerm; } |
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private: |
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/** pointer to term database sygus */ |
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TermDbSygus* d_tds; |
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/** the type enumerator */ |
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TypeEnumerator d_te; |
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/** the current term */ |
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Node d_currTerm; |
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/** cache of (enumerated) builtin values we have enumerated so far */ |
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std::unordered_set<Node> d_cache; |
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}; |
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} // namespace quantifiers |
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} // namespace theory |
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} // namespace cvc5 |
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#endif /* CVC5__THEORY__QUANTIFIERS__SYGUS_ENUMERATOR_BASIC_H */ |