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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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* The strings eager preprocess utility. |
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*/ |
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#include "preprocessing/passes/strings_eager_pp.h" |
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#include "preprocessing/assertion_pipeline.h" |
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#include "theory/rewriter.h" |
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#include "theory/strings/theory_strings_preprocess.h" |
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using namespace cvc5::theory; |
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namespace cvc5 { |
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namespace preprocessing { |
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namespace passes { |
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StringsEagerPp::StringsEagerPp(PreprocessingPassContext* preprocContext) |
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: PreprocessingPass(preprocContext, "strings-eager-pp"){}; |
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PreprocessingPassResult StringsEagerPp::applyInternal( |
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AssertionPipeline* assertionsToPreprocess) |
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{ |
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NodeManager* nm = NodeManager::currentNM(); |
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theory::strings::SkolemCache skc(false); |
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theory::strings::StringsPreprocess pp(&skc); |
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for (size_t i = 0, nasserts = assertionsToPreprocess->size(); i < nasserts; |
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++i) |
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{ |
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Node prev = (*assertionsToPreprocess)[i]; |
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std::vector<Node> asserts; |
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Node rew = pp.processAssertion(prev, asserts); |
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if (!asserts.empty()) |
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{ |
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std::vector<Node> conj; |
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conj.push_back(rew); |
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conj.insert(conj.end(), asserts.begin(), asserts.end()); |
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rew = nm->mkAnd(conj); |
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} |
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if (prev != rew) |
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{ |
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assertionsToPreprocess->replace(i, rewrite(rew)); |
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} |
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} |
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return PreprocessingPassResult::NO_CONFLICT; |
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} |
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} // namespace passes |
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} // namespace preprocessing |
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} // namespace cvc5 |