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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Aina Niemetz |
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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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* Implementation of variable match generator class. |
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*/ |
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#include "theory/quantifiers/ematching/var_match_generator.h" |
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#include "theory/quantifiers/term_util.h" |
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#include "theory/rewriter.h" |
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using namespace cvc5::kind; |
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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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VarMatchGeneratorTermSubs::VarMatchGeneratorTermSubs(Trigger* tparent, |
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Node var, |
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Node subs) |
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: InstMatchGenerator(tparent, Node::null()), |
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d_var(var), |
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d_subs(subs), |
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d_rm_prev(false) |
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{ |
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d_children_types.push_back(d_var.getAttribute(InstVarNumAttribute())); |
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d_var_type = d_var.getType(); |
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} |
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bool VarMatchGeneratorTermSubs::reset(Node eqc) |
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{ |
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d_eq_class = eqc; |
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return true; |
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} |
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int VarMatchGeneratorTermSubs::getNextMatch(Node q, InstMatch& m) |
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{ |
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int ret_val = -1; |
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if (!d_eq_class.isNull()) |
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{ |
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Trace("var-trigger-matching") << "Matching " << d_eq_class << " against " |
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<< d_var << " in " << d_subs << std::endl; |
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TNode tvar = d_var; |
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Node s = d_subs.substitute(tvar, d_eq_class); |
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s = Rewriter::rewrite(s); |
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Trace("var-trigger-matching") |
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<< "...got " << s << ", " << s.getKind() << std::endl; |
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d_eq_class = Node::null(); |
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// if( s.getType().isSubtypeOf( d_var_type ) ){ |
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d_rm_prev = m.get(d_children_types[0]).isNull(); |
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if (!m.set(d_qstate, d_children_types[0], s)) |
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{ |
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return -1; |
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} |
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else |
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{ |
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ret_val = continueNextMatch( |
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q, m, InferenceId::QUANTIFIERS_INST_E_MATCHING_VAR_GEN); |
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if (ret_val > 0) |
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{ |
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return ret_val; |
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} |
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} |
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} |
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if (d_rm_prev) |
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{ |
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m.d_vals[d_children_types[0]] = Node::null(); |
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d_rm_prev = false; |
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} |
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return -1; |
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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 |