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/********************* */
/*! \file cddense_set.h
** \verbatim
** Top contributors (to current version):
** Tim King
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 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 This is an abstraction of a set of unsigned integers.
**
** This is an abstraction of a set of unsigned integers.
** This class is designed to provide constant time insertion, element_of,
** and fast iteration. This is done by storing backing vectors of size greater than
** the maximum key.
**/
#include "cvc4_private.h"
#pragma once
#include <vector>
#include "context/context.h"
#include "context/cdlist_forward.h"
#include "context/cdlist.h"
#include "util/index.h"
namespace CVC4 {
namespace context {
template <class CleanUp = DefaultCleanUp<Index> >
class CDDenseSet {
public:
typedef Index Element;
private:
class RemoveIntCleanup {
private:
std::vector<bool>& d_set;
/**
* The CleanUp functor.
*/
CleanUp d_cleanUp;
public:
RemoveIntCleanup(std::vector<bool>& set, const CleanUp& cleanup)
: d_set(set), d_cleanUp(cleanup)
{}
void operator()(Element* p){
d_cleanup(p);
ArithVar x = *p;
Assert(d_set[x]);
d_set[x] = false;
}
};
typedef CDList<Element, RemoveIntCleanup> ElementList;
ElementList d_list;
std::vector<bool> d_set;
public:
typedef ElementList::const_iterator const_iterator;
CDDenseSet(context::Context* c, const CleanUp& cleanup = CleanUp())
: d_set(), d_list(c, true, RemoveIntCleanup(d_set, cleanup))
{ }
/** This cannot be const as garbage collection is done lazily. */
bool contains(Element x) const{
if(x < d_set.size()){
return d_set[x];
}else{
return false;
}
}
void insert(Element x){
Assert(!contains(x));
if(x >= d_set.size()){
d_set.resize(x+1, false);
}
d_list.push_back(x);
d_set[x] = true;
}
const_iterator begin() const { return d_list.begin(); }
const_iterator end() const { return d_list.end(); }
};/* class CDDenseSet<> */
}/* CVC4::context namespace */
}/* CVC4 namespace */
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