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/********************* */
/*! \file proof_node_to_sexpr.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds, Haniel Barbosa, Gereon Kremer
** This file is part of the CVC4 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.\endverbatim
**
** \brief Conversion from ProofNode to s-expressions
**/
#include "cvc4_private.h"
#ifndef CVC4__EXPR__PROOF_NODE_TO_SEXPR_H
#define CVC4__EXPR__PROOF_NODE_TO_SEXPR_H
#include <map>
#include "expr/node.h"
#include "expr/proof_rule.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:
/** map proof rules to a variable */
std::map<PfRule, Node> d_pfrMap;
/** 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<Node, Node> d_nodeMap;
/** get or make pf rule variable */
Node getOrMkPfRuleVariable(PfRule r);
/** get or make node variable */
Node getOrMkNodeVariable(Node n);
};
} // namespace CVC5
#endif /* CVC4__EXPR__PROOF_RULE_H */
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