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/********************* */
/*! \file ite_removal.h
** \verbatim
** Original author: dejan
** Major contributors: kshitij, mdeters
** Minor contributors (to current version): barrett
** This file is part of the CVC4 prototype.
** Copyright (c) 2009-2012 New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief Removal of term ITEs
**
** Removal of term ITEs.
**/
#include "cvc4_private.h"
#pragma once
#include <vector>
#include "expr/node.h"
#include "util/dump.h"
#include "context/context.h"
#include "context/cdhashmap.h"
namespace CVC4 {
typedef std::hash_map<Node, unsigned, NodeHashFunction> IteSkolemMap;
class RemoveITE {
typedef context::CDHashMap<Node, Node, NodeHashFunction> ITECache;
ITECache d_iteCache;
public:
RemoveITE(context::UserContext* u) :
d_iteCache(u) {
}
/**
* Removes the ITE nodes by introducing skolem variables. All
* additional assertions are pushed into assertions. iteSkolemMap
* contains a map from introduced skolem variables to the index in
* assertions containing the new Boolean ite created in conjunction
* with that skolem variable.
*/
void run(std::vector<Node>& assertions, IteSkolemMap& iteSkolemMap);
/**
* Removes the ITE from the node by introducing skolem
* variables. All additional assertions are pushed into
* assertions. iteSkolemMap contains a map from introduced skolem
* variables to the index in assertions containing the new Boolean
* ite created in conjunction with that skolem variable.
*/
Node run(TNode node, std::vector<Node>& additionalAssertions,
IteSkolemMap& iteSkolemMap);
};/* class RemoveTTE */
}/* CVC4 namespace */
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