harbour-core/harbour/tests/testop.prg

/*
 * $Id$
 */

/*
 * Harbour Project source code:
 * Testing the operators-overloading feature
 *
 * Copyright 2000 Antonio Linares <alinares@fivetech.com>
 * www - http://harbour-project.org
 *
 * This program 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 2, or (at your option)
 * any later version.
 *
 * This program 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 this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

#include "hbclass.ch"

// Right now you can overload operators with Harbour
// as C++ does!!! Not all operators are available. ASAP we will provide all
// of them.


//

PROCEDURE Main()

   LOCAL oCar := TCar():New( "red", 2 )
   LOCAL oPetrol := NIL

   oCar := oCar + oPetrol

   HB_SYMBOL_UNUSED( oCar )

   RETURN

//

CREATE CLASS TCar

   VAR cColor
   VAR nDoors
   VAR oGas

   METHOD New( cColor, nDoors ) CONSTRUCTOR

   METHOD SUM( oObject ) OPERATOR '+'

ENDCLASS

//

METHOD New( cColor, nDoors ) CLASS TCar

   IF cColor == NIL
      cColor := "White"
   ENDIF
   IF nDoors == NIL
      nDoors := 4
   ENDIF

   ::cColor := cColor
   ::nDoors := nDoors

   RETURN Self

//

METHOD SUM( oObject ) CLASS TCar

   HB_SYMBOL_UNUSED( oObject )

   Alert( "+ has a special meaning and " + ;
      "functionality for TCar Class objects!!!" )

   RETURN NIL

//