localvar.h

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// Copyright (C) 1997-2010 by Pawel Pilarczyk.
//
// This file is part of the Homology Library.  This library 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 of the License, or (at your option) any later version.
//
// This library 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 "license.txt".  If not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.

// Started on June 12, 2008. Last revision: June 13, 2008.


#ifndef _CHOMP_STRUCT_LOCALVAR_H_
#define _CHOMP_STRUCT_LOCALVAR_H_


namespace chomp {
namespace homology {


// --------------------------------------------------
// -------------------- LOCALVAR --------------------
// --------------------------------------------------

template <class varType>
class local_var
{
public:
        local_var (varType &_variable);

        local_var (varType &_variable, const varType &_newValue);

        ~local_var ();

private:
        varType &var;

        const varType value;

}; /* class local_var */

// --------------------------------------------------

template <class varType>
inline local_var<varType>::local_var (varType &_variable):
        var (_variable), value (_variable)
{
        return;
} /* local_var */

template <class varType>
inline local_var<varType>::local_var (varType &_variable,
        const varType &_newValue): var (_variable), value (_variable)
{
        _variable = _newValue;
        return;
} /* local_var */

template <class varType>
inline local_var<varType>::~local_var ()
{
        var = value;
        return;
} /* ~local_var */


} // namespace homology
} // namespace chomp

#endif // _CHOMP_STRUCT_LOCALVAR_H_