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/********************* */
/*! \file emptyset.h
** \verbatim
** Top contributors (to current version):
** Kshitij Bansal, Tim King, Morgan Deters
** This file is part of the CVC4 project.
** Copyright (c) 2009-2018 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"
#pragma once
#include <iosfwd>
namespace CVC4 {
// messy; Expr needs EmptySet (because it's the payload of a
// CONSTANT-kinded expression), EmptySet needs SetType, and
// SetType needs Expr. Using a forward declaration here in
// order to break the build cycle.
// Uses of SetType need to be as an incomplete type throughout
// this header.
class SetType;
}/* CVC4 namespace */
namespace CVC4 {
class CVC4_PUBLIC 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 SetType& setType);
~EmptySet();
EmptySet(const EmptySet& other);
EmptySet& operator=(const EmptySet& other);
const SetType& 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:
/** Pointer to the SetType node. This is never NULL. */
SetType* d_type;
EmptySet();
};/* class EmptySet */
std::ostream& operator<<(std::ostream& out, const EmptySet& es) CVC4_PUBLIC;
struct CVC4_PUBLIC EmptySetHashFunction {
size_t operator()(const EmptySet& es) const;
};/* struct EmptySetHashFunction */
}/* CVC4 namespace */
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