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diff --git a/libs/cassowary/cassowary/ClTypedefs.h b/libs/cassowary/cassowary/ClTypedefs.h
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+// $Id$
+//
+// Cassowary Incremental Constraint Solver
+// Original Smalltalk Implementation by Alan Borning
+// This C++ Implementation by Greg J. Badros, <gjb@cs.washington.edu>
+// http://www.cs.washington.edu/homes/gjb
+// (C) 1998, 1999 Greg J. Badros and Alan Borning
+// See ../LICENSE for legal details regarding this software
+//
+// ClTypedefs.h
+
+#ifndef CL_TYPEDEFS_H__
+#define CL_TYPEDEFS_H__
+
+#if defined(HAVE_CONFIG_H) && !defined(CONFIG_H_INCLUDED) && !defined(CONFIG_INLINE_H_INCLUDED)
+#include <cassowary/config-inline.h>
+#define CONFIG_INLINE_H_INCLUDED
+#endif
+
+#include "ClLinearExpression_fwd.h"
+#include <set> 
+#include <map>
+#include <vector>
+
+using std::set;
+using std::map;
+using std::vector;
+
+class ClVariable;
+class ClConstraint;
+class ClEditInfo;
+
+typedef set<ClVariable> ClVarSet;  
+typedef map<ClVariable, ClVarSet > ClTableauColumnsMap;
+typedef map<ClVariable, ClLinearExpression *> ClTableauRowsMap;
+
+// For Solver
+typedef map<const ClConstraint *, ClVarSet> ClConstraintToVarSetMap;
+typedef map<const ClConstraint *, ClVariable> ClConstraintToVarMap;
+typedef map<ClVariable, const ClConstraint *> ClVarToConstraintMap;
+typedef vector<ClVariable> ClVarVector;
+
+typedef set<const ClConstraint *> ClConstraintSet;
+
+// For FDSolver
+typedef map<ClVariable, ClConstraintSet> ClVarToConstraintSetMap;
+
+#endif