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/********************* */
/*! \file term_context_node.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds, 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 Term context node utility.
**/
#include "cvc4_private.h"
#ifndef CVC4__EXPR__TERM_CONTEXT_NODE_H
#define CVC4__EXPR__TERM_CONTEXT_NODE_H
#include "expr/node.h"
namespace cvc5 {
class TCtxStack;
class TermContext;
/**
* A (term-context) sensitive term. This is a wrapper around a Node that
* additionally has a term context identifier, see getTermContext(). It depends
* on a pointer to a TermContext callback class (see term_context.h).
*/
class TCtxNode
{
friend class TCtxStack;
public:
TCtxNode(Node n, const TermContext* tctx);
/** get number of children */
size_t getNumChildren() const;
/** get child at index i */
TCtxNode getChild(size_t i) const;
/** get node */
Node getNode() const;
/** get context */
uint32_t getContextId() const;
/** get term context */
const TermContext* getTermContext() const;
//---------------------- utility methods
/**
* Get node hash, which is a unique node representation of this TCtxNode.
* This method calls the method below on the data members of this class.
*/
Node getNodeHash() const;
/**
* Get node hash, which is a unique node representation of the pair (n, val).
* In particular, this returns (SEXPR n (CONST_RATIONAL val)).
*/
static Node computeNodeHash(Node n, uint32_t val);
/**
* Decompose node hash, which is an inverse of the above operation. In
* particular, given input h, this returns a node n and sets val to a value
* such that computeNodeHash(n, val) returns h.
*/
static Node decomposeNodeHash(Node h, uint32_t& val);
//---------------------- end utility methods
private:
/** private constructor */
TCtxNode(Node n, uint32_t val, const TermContext* tctx);
/** The node */
Node d_node;
/** The term context identifier */
uint32_t d_val;
/** The term context */
const TermContext* d_tctx;
};
} // namespace cvc5
#endif /* CVC4__EXPR__TERM_CONVERSION_PROOF_GENERATOR_H */
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