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Diffstat (limited to 'src/expr/emptybag.h')
-rw-r--r-- | src/expr/emptybag.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/expr/emptybag.h b/src/expr/emptybag.h new file mode 100644 index 000000000..a16c12d86 --- /dev/null +++ b/src/expr/emptybag.h @@ -0,0 +1,63 @@ +/********************* */ +/*! \file emptybag.h + ** \verbatim + ** Top contributors (to current version): + ** Mudathir Mohamed + ** 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 a class for empty bags + **/ + +#include "cvc4_public.h" + +#ifndef CVC4__EMPTY_BAG_H +#define CVC4__EMPTY_BAG_H + +#include <iosfwd> +#include <memory> + +namespace CVC4 { + +class TypeNode; + +class CVC4_PUBLIC EmptyBag +{ + public: + /** + * Constructs an emptybag of the specified type. Note that the argument + * is the type of the bag itself, NOT the type of the elements. + */ + EmptyBag(const TypeNode& bagType); + ~EmptyBag(); + EmptyBag(const EmptyBag& other); + EmptyBag& operator=(const EmptyBag& other); + + const TypeNode& getType() const; + bool operator==(const EmptyBag& es) const; + bool operator!=(const EmptyBag& es) const; + bool operator<(const EmptyBag& es) const; + bool operator<=(const EmptyBag& es) const; + bool operator>(const EmptyBag& es) const; + bool operator>=(const EmptyBag& es) const; + + private: + EmptyBag(); + + /** the type of the empty bag itself (not the type of the elements)*/ + std::unique_ptr<TypeNode> d_type; +}; /* class EmptyBag */ + +std::ostream& operator<<(std::ostream& out, const EmptyBag& es) CVC4_PUBLIC; + +struct CVC4_PUBLIC EmptyBagHashFunction +{ + size_t operator()(const EmptyBag& es) const; +}; /* struct EmptyBagHashFunction */ + +} // namespace CVC4 + +#endif /* CVC4__EMPTY_BAG_H */ |