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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 proof step and proof step buffer utilities. |
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*/ |
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#include "proof/proof_step_buffer.h" |
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#include "proof/proof_checker.h" |
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using namespace cvc5::kind; |
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namespace cvc5 { |
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ProofStep::ProofStep() : d_rule(PfRule::UNKNOWN) {} |
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ProofStep::ProofStep(PfRule r, |
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const std::vector<Node>& children, |
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const std::vector<Node>& args) |
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: d_rule(r), d_children(children), d_args(args) |
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{ |
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} |
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std::ostream& operator<<(std::ostream& out, ProofStep step) |
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{ |
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out << "(step " << step.d_rule; |
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for (const Node& c : step.d_children) |
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{ |
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out << " " << c; |
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} |
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if (!step.d_args.empty()) |
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{ |
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out << " :args"; |
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for (const Node& a : step.d_args) |
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{ |
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out << " " << a; |
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} |
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} |
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out << ")"; |
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return out; |
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} |
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ProofStepBuffer::ProofStepBuffer(ProofChecker* pc) : d_checker(pc) {} |
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Node ProofStepBuffer::tryStep(PfRule id, |
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const std::vector<Node>& children, |
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const std::vector<Node>& args, |
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Node expected) |
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{ |
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if (d_checker == nullptr) |
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{ |
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Assert(false) << "ProofStepBuffer::ProofStepBuffer: no proof checker."; |
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return Node::null(); |
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} |
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Node res = |
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d_checker->checkDebug(id, children, args, expected, "pf-step-buffer"); |
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if (!res.isNull()) |
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{ |
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// add proof step |
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d_steps.push_back( |
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std::pair<Node, ProofStep>(res, ProofStep(id, children, args))); |
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} |
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return res; |
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} |
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void ProofStepBuffer::addStep(PfRule id, |
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const std::vector<Node>& children, |
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const std::vector<Node>& args, |
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Node expected) |
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{ |
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d_steps.push_back( |
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std::pair<Node, ProofStep>(expected, ProofStep(id, children, args))); |
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} |
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void ProofStepBuffer::addSteps(ProofStepBuffer& psb) |
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{ |
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const std::vector<std::pair<Node, ProofStep>>& steps = psb.getSteps(); |
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for (const std::pair<Node, ProofStep>& step : steps) |
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{ |
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addStep(step.second.d_rule, |
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step.second.d_children, |
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step.second.d_args, |
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step.first); |
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} |
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} |
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void ProofStepBuffer::popStep() |
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{ |
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Assert(!d_steps.empty()); |
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if (!d_steps.empty()) |
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{ |
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d_steps.pop_back(); |
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} |
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} |
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size_t ProofStepBuffer::getNumSteps() const { return d_steps.size(); } |
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const std::vector<std::pair<Node, ProofStep>>& ProofStepBuffer::getSteps() const |
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{ |
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return d_steps; |
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} |
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void ProofStepBuffer::clear() { d_steps.clear(); } |
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} // namespace cvc5 |