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+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* Rasdaman community is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+/
+/**
+ * INCLUDE: scalar.hh
+ *
+ * MODULE:  raslib
+ * CLASS:   r_Scalar
+ *
+ * COMMENTS:
+ * 
+ * The class represents a scalar type value.
+ *
+*/
+
+#ifndef _D_SCALAR_
+#define _D_SCALAR_
+
+#include <iosfwd>
+
+#include "raslib/error.hh"
+
+class r_Base_Type;
+ 
+//@ManMemo: Module: {\bf raslib}
+
+/*@Doc:
+
+ Class \Ref{r_Scalar} represents a scalar type value which 
+ is either \Ref{r_Primitive} or \Ref{r_Structure}.
+ 
+*/
+
+class r_Scalar
+{
+  public:
+    /// constructs a scalar value
+    r_Scalar( const r_Base_Type* newType );
+
+    /// copy constructor
+    r_Scalar( const r_Scalar& obj );
+
+    /// destructor
+    virtual ~r_Scalar();
+
+    /// clone operator
+    virtual r_Scalar* clone() const=0;
+
+    /// operator for assigning a scalar
+    virtual const r_Scalar& operator= ( const r_Scalar& );
+
+    /// debug output
+    virtual void print_status(std::ostream& s) const = 0;
+
+    /// get type
+    virtual const r_Base_Type* get_type() const; 
+
+    /// 
+    virtual bool isStructure() const;
+
+    ///
+    virtual bool isComplex() const;
+
+    ///
+    virtual bool isPrimitive() const;
+
+  protected:
+    /// type
+    r_Base_Type* valueType;
+};
+
+
+
+//@ManMemo: Module: {\bf raslib}
+/**
+  Output stream operator for objects of type {\tt const} \Ref{r_Scalar}.
+*/  
+extern std::ostream& operator<<(std::ostream& s, const r_Scalar& obj );
+
+#endif
+