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/****************************************************************************** |
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* Top contributors (to current version): |
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* Abdalrhman Mohamed |
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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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* Utility class for Sygus Reconstruct module. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__QUANTIFIERS__RCONS_TYPE_INFO_H |
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#define CVC5__THEORY__QUANTIFIERS__RCONS_TYPE_INFO_H |
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#include "theory/quantifiers/sygus/sygus_enumerator.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace quantifiers { |
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class RConsObligation; |
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/** |
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* A utility class for Sygus Reconstruct datatype types (grammar non-terminals). |
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* This class is mainly responsible for enumerating sygus datatype type terms |
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* and building sets of equivalent builtin terms for the rcons algorithm. |
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*/ |
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class RConsTypeInfo |
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{ |
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public: |
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/** |
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* Initialize a sygus enumerator and a candidate rewrite database for this |
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* class' sygus datatype type. |
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* |
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* @param tds Database for sygus terms |
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* @param s Statistics managed for the synth engine |
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* @param stn The sygus datatype type encoding the syntax restrictions |
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* @param builtinVars A list containing the builtin analog of sygus variable |
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* list for the sygus datatype type |
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*/ |
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void initialize(TermDbSygus* tds, |
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SygusStatistics& s, |
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TypeNode stn, |
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const std::vector<Node>& builtinVars); |
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/** |
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* Returns the next enumerated term for the given sygus datatype type. |
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* |
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* @return The enumerated sygus term |
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*/ |
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Node nextEnum(); |
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/** |
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* Add a pure term to the candidate rewrite database. |
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* |
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* @param n The term to add to the database |
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* @return A previous term `eq_n` added to this class, such that `n` is |
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* equivalent to `eq_n`. If no previous term equivalent to `n` exists then the |
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* result is `n` itself |
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*/ |
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Node addTerm(Node n); |
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/** |
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* Set the obligation responsible for solving the given builtin term. |
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* |
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* @param t The builtin term |
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* @param ob The corresponding obligation |
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*/ |
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void setBuiltinToOb(Node t, RConsObligation* ob); |
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/** |
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* Return the obligation responsible for solving the given builtin term. |
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* |
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* @param t The builtin term |
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* @return The corresponding obligation |
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*/ |
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RConsObligation* builtinToOb(Node t); |
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private: |
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/** Sygus terms enumerator for this class' Sygus datatype type */ |
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std::unique_ptr<SygusEnumerator> d_enumerator; |
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/** Candidate rewrite database for this class' sygus datatype type */ |
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std::unique_ptr<CandidateRewriteDatabase> d_crd; |
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/** Sygus sampler needed for initializing the candidate rewrite database */ |
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SygusSampler d_sygusSampler; |
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/** A map from a builtin term to its obligation. |
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* |
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* Each sygus datatype type has its own version of this map because it is |
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* possible to have multiple obligations to reconstruct the same builtin term |
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* from different sygus datatype types. |
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*/ |
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std::unordered_map<Node, RConsObligation*> d_ob; |
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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__RCONS_TYPE_INFO_H |