size_t begin = str.find_first_not_of(' ', end);

    const size_t begin = str.find_first_not_of(' ', end);

      const char *impl = CCTK_GroupImplementationI(gi);

      const char *const impl = CCTK_GroupImplementationI(gi);

    int gi = groups0[n];

    const int gi = groups0[n];