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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 quantifier relevance. |
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*/ |
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#include "theory/quantifiers/quant_relevance.h" |
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using namespace std; |
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using namespace cvc5::kind; |
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using namespace cvc5::context; |
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namespace cvc5 { |
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namespace theory { |
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namespace quantifiers { |
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QuantRelevance::QuantRelevance(Env& env) : QuantifiersUtil(env) {} |
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void QuantRelevance::registerQuantifier(Node f) |
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{ |
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// compute symbols in f |
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std::vector<Node> syms; |
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computeSymbols(f[1], syms); |
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d_syms[f].insert(d_syms[f].begin(), syms.begin(), syms.end()); |
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} |
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/** compute symbols */ |
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void QuantRelevance::computeSymbols(Node n, std::vector<Node>& syms) |
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{ |
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if (n.getKind() == APPLY_UF) |
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{ |
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Node op = n.getOperator(); |
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if (std::find(syms.begin(), syms.end(), op) == syms.end()) |
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{ |
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syms.push_back(op); |
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} |
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} |
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if (n.getKind() != FORALL) |
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{ |
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for (int i = 0; i < (int)n.getNumChildren(); i++) |
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{ |
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computeSymbols(n[i], syms); |
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} |
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} |
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} |
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size_t QuantRelevance::getNumQuantifiersForSymbol(Node s) const |
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{ |
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std::map<Node, std::vector<Node> >::const_iterator it = d_syms_quants.find(s); |
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if (it == d_syms_quants.end()) |
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{ |
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return 0; |
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} |
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return it->second.size(); |
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} |
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} // namespace quantifiers |
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} // namespace theory |
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} // namespace cvc5 |