Helper.h

#ifndef __CONSTANTS_HELPER_H__
#define __CONSTANTS_HELPER_H__

#include <map>

namespace MDSimulation
{
    namespace Constants
    {

        template <typename source>
        inline std::map<source, int> invert_array_mapping(
                source const * const arr, const int len)
        {
            std::map<source, int> retval;

            for (int i = 0; i < len; ++i)
            {
                retval[arr[i]] = i;
            }

            return retval;
        }
    }
}

#endif