ModifyRestore.h

//-*-C++-*-
/***************************************************************************
 *
 *   Copyright (C) 2005 by Willem van Straten
 *   Licensed under the Academic Free License version 2.1
 *
 ***************************************************************************/
 
// psrchive/Util/units/ModifyRestore.h
 
#ifndef __ModifyRestore_h
#define __ModifyRestore_h

template<class T>
class ModifyRestore
{
 public:

  ModifyRestore (T& value, const T& modified_value) : the_value (value)
    { restore_value = value; the_value = modified_value; }

  ModifyRestore (T& value) : the_value (value)
    { restore_value = value; }

  ~ModifyRestore ()
    { the_value = restore_value; }
 
 protected:

  T& the_value;

  T restore_value;
 
};
 
#endif