EnumIterator.hpp

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//==============================================================================
//
//  This file is part of GNSSTk, the ARL:UT GNSS Toolkit.
//
//  The GNSSTk is free software; you can redistribute it and/or modify
//  it under the terms of the GNU Lesser General Public License as published
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//  any later version.
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//  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 GNSSTk; if not, write to the Free Software Foundation,
//  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
//
//  This software was developed by Applied Research Laboratories at the
//  University of Texas at Austin.
//  Copyright 2004-2022, The Board of Regents of The University of Texas System
//
//==============================================================================
 
//==============================================================================
//
//  This software was developed by Applied Research Laboratories at the
//  University of Texas at Austin, under contract to an agency or agencies
//  within the U.S. Department of Defense. The U.S. Government retains all
//  rights to use, duplicate, distribute, disclose, or release this software.
//
//  Pursuant to DoD Directive 523024
//
//  DISTRIBUTION STATEMENT A: This software has been approved for public
//                            release, distribution is unlimited.
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//==============================================================================
 
// Adapted from a post on stackoverflow.com
 
#ifndef GNSSTK_ENUMITERATOR_HPP
#define GNSSTK_ENUMITERATOR_HPP
 
#include <type_traits>
 
namespace gnsstk
{
   template <typename C, C beginVal, C endVal>
   class EnumIterator
   {
      typedef typename std::underlying_type<C>::type ValType;
      ValType val;
   public:
      EnumIterator()
            : val(static_cast<ValType>(beginVal))
      {}
      EnumIterator(const C& f)
            : val(static_cast<ValType>(f))
      {}
      EnumIterator& operator++()
      {
         val++;
         return *this;
      }
      C operator*()
      { return static_cast<C>(val); }
      EnumIterator begin()
      { return *this; }
      EnumIterator end()
      {
         static const EnumIterator endIter = EnumIterator(endVal);
         return endIter;
      }
      bool operator!=(const EnumIterator& i)
      { return val != i.val; }
   };
}
 
#endif // GNSSTK_ENUMITERATOR_HPP