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/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds, Haniel Barbosa, Gereon Kremer
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
* in the top-level source directory and their institutional affiliations.
* All rights reserved. See the file COPYING in the top-level source
* directory for licensing information.
* ****************************************************************************
*
* Conversion from ProofNode to s-expressions.
*/
#include "cvc5_private.h"
#ifndef CVC5__PROOF__PROOF_NODE_TO_SEXPR_H
#define CVC5__PROOF__PROOF_NODE_TO_SEXPR_H
#include <map>
#include "expr/kind.h"
#include "expr/node.h"
#include "proof/method_id.h"
#include "proof/proof_rule.h"
#include "theory/inference_id.h"
#include "theory/theory_id.h"
namespace cvc5 {
class ProofNode;
/** A class to convert ProofNode objects to s-expressions */
class ProofNodeToSExpr
{
public:
ProofNodeToSExpr();
~ProofNodeToSExpr() {}
/** Convert the given proof node to an s-expression
*
* This is useful for operations where it is useful to view a ProofNode as
* a Node. Printing is one such example, where a ProofNode can be printed
* as a dag after this conversion.
*
* The s-expression for a ProofNode has the form:
* (SEXPR (VAR "<d_rule>") S1 ... Sn (VAR ":args") (SEXPR <d_args>))
* where S1, ..., Sn are the s-expressions for its <d_children>.
*/
Node convertToSExpr(const ProofNode* pn);
private:
/** argument format, determines how to print an argument */
enum class ArgFormat
{
// just use the argument itself
DEFAULT,
// print the argument as a kind
KIND,
// print the argument as a theory id
THEORY_ID,
// print the argument as a method id
METHOD_ID,
// print the argument as an inference id
INFERENCE_ID,
// print a variable whose name is the term (see getOrMkNodeVariable)
NODE_VAR
};
/** map proof rules to a variable */
std::map<PfRule, Node> d_pfrMap;
/** map kind to a variable displaying the kind they represent */
std::map<Kind, Node> d_kindMap;
/** map theory ids to a variable displaying the theory id they represent */
std::map<theory::TheoryId, Node> d_tidMap;
/** map method ids to a variable displaying the method id they represent */
std::map<MethodId, Node> d_midMap;
/** map infer ids to a variable displaying the method id they represent */
std::map<theory::InferenceId, Node> d_iidMap;
/** Dummy ":args" marker */
Node d_argsMarker;
/** Dummy ":conclusion" marker */
Node d_conclusionMarker;
/** map proof nodes to their s-expression */
std::map<const ProofNode*, Node> d_pnMap;
/**
* map nodes to a bound variable, used for nodes that have special AST status
* like builtin operators
*/
std::map<TNode, Node> d_nodeMap;
/** get or make pf rule variable */
Node getOrMkPfRuleVariable(PfRule r);
/** get or make kind variable from the kind embedded in n */
Node getOrMkKindVariable(TNode n);
/** get or make theory id variable */
Node getOrMkTheoryIdVariable(TNode n);
/** get or make method id variable */
Node getOrMkMethodIdVariable(TNode n);
/** get or make inference id variable */
Node getOrMkInferenceIdVariable(TNode n);
/**
* Get or make node variable that prints the same as n but has SEXPR type.
* This is used to ensure the type checker does not complain when trying to
* print e.g. builtin operators as first-class terms in the SEXPR.
*/
Node getOrMkNodeVariable(TNode n);
/** get argument based on the provided format */
Node getArgument(Node arg, ArgFormat f);
/** get argument format for proof node */
ArgFormat getArgumentFormat(const ProofNode* pn, size_t i);
};
} // namespace cvc5
#endif /* CVC5__PROOF__PROOF_RULE_H */
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