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+/********************* */
+/*! \file predicate.h
+ ** \verbatim
+ ** Original author: Morgan Deters
+ ** Major contributors: none
+ ** 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 Representation of predicates for predicate subtyping
+ **
+ ** Simple class to represent predicates for predicate subtyping.
+ ** Instances of this class are carried as the payload of
+ ** the CONSTANT-metakinded SUBTYPE_TYPE types.
+ **/
+
+#include "cvc4_public.h"
+
+#ifndef __CVC4__PREDICATE_H
+#define __CVC4__PREDICATE_H
+
+#include "base/exception.h"
+
+namespace CVC4 {
+
+class Predicate;
+
+std::ostream& operator<<(std::ostream& out, const Predicate& p) CVC4_PUBLIC;
+
+struct CVC4_PUBLIC PredicateHashFunction {
+ size_t operator()(const Predicate& p) const;
+};/* class PredicateHashFunction */
+
+}/* CVC4 namespace */
+
+// TIM: This needs to be here due to a circular dependency.
+#warning "TODO: Track down the circular dependence on expr.h."
+#include "expr/expr.h"
+
+namespace CVC4 {
+
+class CVC4_PUBLIC Predicate {
+
+ Expr d_predicate;
+ Expr d_witness;
+
+public:
+
+ Predicate(Expr e, Expr w = Expr()) throw(IllegalArgumentException);
+
+ operator Expr() const;
+
+ bool operator==(const Predicate& p) const;
+
+ friend std::ostream& CVC4::operator<<(std::ostream& out, const Predicate& p);
+ friend size_t PredicateHashFunction::operator()(const Predicate& p) const;
+
+};/* class Predicate */
+
+}/* CVC4 namespace */
+
+#endif /* __CVC4__PREDICATE_H */
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