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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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* Variable match generator class. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__QUANTIFIERS__VAR_MATCH_GENERATOR_H |
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#define CVC5__THEORY__QUANTIFIERS__VAR_MATCH_GENERATOR_H |
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#include "expr/node.h" |
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#include "theory/quantifiers/ematching/inst_match_generator.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace quantifiers { |
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namespace inst { |
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/** match generator for purified terms |
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* This handles the special case of invertible terms like x+1 (see |
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* Trigger::getTermInversionVariable). |
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*/ |
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class VarMatchGeneratorTermSubs : public InstMatchGenerator |
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{ |
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public: |
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VarMatchGeneratorTermSubs(Trigger* tparent, Node var, Node subs); |
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/** Reset */ |
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bool reset(Node eqc) override; |
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/** Get the next match. */ |
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int getNextMatch(Node q, InstMatch& m) override; |
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private: |
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/** variable we are matching (x in the example x+1). */ |
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Node d_var; |
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/** cache of d_var.getType() */ |
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TypeNode d_var_type; |
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/** The substitution for what we match (x-1 in the example x+1). */ |
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Node d_subs; |
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/** stores whether we have written a value for d_var in the current match. */ |
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bool d_rm_prev; |
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}; |
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} // namespace inst |
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} // namespace quantifiers |
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} // namespace theory |
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} // namespace cvc5 |
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#endif |