EmptyWrapper

EmptyWrapper. An 'emptywrapper' is used for uminus and uplus operators
 (these operators only expect one object). Therefore the other object is
 replaced by an empty one. Emptywrapper is called in Subtraction and
 Addition when only one object is expected (eg: not 5+9 (two objects)
 but just -14 (only one object))

  Licence:
    This file is part of ACADO Toolkit  - (http://www.acadotoolkit.org/)

    ACADO Toolkit -- A Toolkit for Automatic Control and Dynamic Optimization.
    Copyright (C) 2008-2009 by Boris Houska and Hans Joachim Ferreau, K.U.Leuven.
    Developed within the Optimization in Engineering Center (OPTEC) under
    supervision of Moritz Diehl. All rights reserved.

    ACADO Toolkit is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 3 of the License, or (at your option) any later version.

    ACADO Toolkit 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with ACADO Toolkit; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

    Author: David Ariens
    Date: 2009

0001 %EmptyWrapper. An 'emptywrapper' is used for uminus and uplus operators
0002 % (these operators only expect one object). Therefore the other object is
0003 % replaced by an empty one. Emptywrapper is called in Subtraction and
0004 % Addition when only one object is expected (eg: not 5+9 (two objects)
0005 % but just -14 (only one object))
0006 %
0007 %  Licence:
0008 %    This file is part of ACADO Toolkit  - (http://www.acadotoolkit.org/)
0009 %
0010 %    ACADO Toolkit -- A Toolkit for Automatic Control and Dynamic Optimization.
0011 %    Copyright (C) 2008-2009 by Boris Houska and Hans Joachim Ferreau, K.U.Leuven.
0012 %    Developed within the Optimization in Engineering Center (OPTEC) under
0013 %    supervision of Moritz Diehl. All rights reserved.
0014 %
0015 %    ACADO Toolkit is free software; you can redistribute it and/or
0016 %    modify it under the terms of the GNU Lesser General Public
0017 %    License as published by the Free Software Foundation; either
0018 %    version 3 of the License, or (at your option) any later version.
0019 %
0020 %    ACADO Toolkit is distributed in the hope that it will be useful,
0021 %    but WITHOUT ANY WARRANTY; without even the implied warranty of
0022 %    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0023 %    Lesser General Public License for more details.
0024 %
0025 %    You should have received a copy of the GNU Lesser General Public
0026 %    License along with ACADO Toolkit; if not, write to the Free Software
0027 %    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
0028 %
0029 %    Author: David Ariens
0030 %    Date: 2009
0031 %
0032 classdef EmptyWrapper < acado.Expression   
0033     properties(SetAccess='private')
0034 
0035     end
0036     
0037     methods
0038         function obj = EmptyWrapper()
0039 
0040         end
0041         
0042         function s = toString(obj)
0043             s = '';
0044         end
0045     end
0046     
0047 end
0048