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/********************* */
/*! \file emptyset.h
** \verbatim
** Top contributors (to current version):
** Tim King, Andres Noetzli, Kshitij Bansal
** 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 [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/
#include "cvc4_public.h"
#ifndef CVC4__EMPTY_SET_H
#define CVC4__EMPTY_SET_H
#include <iosfwd>
#include <memory>
namespace CVC5 {
class TypeNode;
class EmptySet
{
public:
/**
* Constructs an emptyset of the specified type. Note that the argument
* is the type of the set itself, NOT the type of the elements.
*/
EmptySet(const TypeNode& setType);
~EmptySet();
EmptySet(const EmptySet& other);
EmptySet& operator=(const EmptySet& other);
const TypeNode& getType() const;
bool operator==(const EmptySet& es) const;
bool operator!=(const EmptySet& es) const;
bool operator<(const EmptySet& es) const;
bool operator<=(const EmptySet& es) const;
bool operator>(const EmptySet& es) const;
bool operator>=(const EmptySet& es) const;
private:
EmptySet();
std::unique_ptr<TypeNode> d_type;
}; /* class EmptySet */
std::ostream& operator<<(std::ostream& out, const EmptySet& es);
struct EmptySetHashFunction
{
size_t operator()(const EmptySet& es) const;
}; /* struct EmptySetHashFunction */
} // namespace CVC5
#endif /* CVC4__EMPTY_SET_H */
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