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/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds
*
* 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.
* ****************************************************************************
*
* Utilities for printing expressions in proofs
*/
#include "cvc5_private.h"
#ifndef CVC5__PROOF__PRINT_EXPR_H
#define CVC5__PROOF__PRINT_EXPR_H
#include <iostream>
#include <map>
#include "expr/node.h"
#include "proof/proof_node.h"
namespace cvc5 {
namespace proof {
/**
* A term, type or a proof. This class is used for printing combinations of
* proofs terms and types.
*/
class PExpr
{
public:
PExpr() : d_node(), d_pnode(nullptr), d_typeNode() {}
PExpr(Node n) : d_node(n), d_pnode(nullptr), d_typeNode() {}
PExpr(const ProofNode* pn) : d_node(), d_pnode(pn), d_typeNode() {}
PExpr(TypeNode tn) : d_node(), d_pnode(nullptr), d_typeNode(tn) {}
~PExpr() {}
/** The node, if this p-exression is a node */
Node d_node;
/** The proof node, if this p-expression is a proof */
const ProofNode* d_pnode;
/** The type node, if this p-expression is a type */
TypeNode d_typeNode;
};
/**
* A stream of p-expressions, which appends p-expressions to a reference vector.
* That vector can then be used when printing a proof.
*/
class PExprStream
{
public:
/**
* Takes a reference to a stream (vector of p-expressions), and the
* representation true/false (tt/ff).
*/
PExprStream(std::vector<PExpr>& stream,
Node tt = Node::null(),
Node ff = Node::null());
/** Append a proof node */
PExprStream& operator<<(const ProofNode* pn);
/** Append a node */
PExprStream& operator<<(Node n);
/** Append a type node */
PExprStream& operator<<(TypeNode tn);
/** Append a Boolean */
PExprStream& operator<<(bool b);
/** Append a pexpr */
PExprStream& operator<<(PExpr p);
private:
/** Reference to the stream */
std::vector<PExpr>& d_stream;
/** Builtin nodes for true and false */
Node d_tt;
Node d_ff;
};
} // namespace proof
} // namespace cvc5
#endif
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