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/********************* */
/*! \file emptyset.h
** \verbatim
** Original author: Kshitij Bansal
** Major contributors: Morgan Deters
** Minor contributors (to current version): none
** This file is part of the CVC4 project.
** Copyright (c) 2009-2014 New York University and The University of Iowa
** 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
namespace CVC4 {
// messy; Expr needs EmptySet (because it's the payload of a
// CONSTANT-kinded expression), and EmptySet needs Expr.
class CVC4_PUBLIC EmptySet;
}/* CVC4 namespace */
#include "expr/expr.h"
#include "expr/type.h"
#include <iostream>
namespace CVC4 {
class CVC4_PUBLIC EmptySet {
const SetType d_type;
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(SetType setType):d_type(setType) { }
~EmptySet() throw() {
}
SetType getType() const { return d_type; }
bool operator==(const EmptySet& es) const throw() {
return d_type == es.d_type;
}
bool operator!=(const EmptySet& es) const throw() {
return !(*this == es);
}
bool operator<(const EmptySet& es) const throw() {
return d_type < es.d_type;
}
bool operator<=(const EmptySet& es) const throw() {
return d_type <= es.d_type;
}
bool operator>(const EmptySet& es) const throw() {
return !(*this <= es);
}
bool operator>=(const EmptySet& es) const throw() {
return !(*this < es);
}
};/* class EmptySet */
std::ostream& operator<<(std::ostream& out, const EmptySet& es) CVC4_PUBLIC;
struct CVC4_PUBLIC EmptySetHashFunction {
inline size_t operator()(const EmptySet& es) const {
return TypeHashFunction()(es.getType());
}
};/* struct EmptySetHashFunction */
}/* CVC4 namespace */
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