You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: d_adimat_norm2.m
    path of file: ./repos/d2d/arFramework3/ThirdParty/StrucID/adimat/runtime
    
    the code of the file until where you have to start completion: % Generated by ADiMat 0.6.0-4867
% © 2001-2008 Andre Vehreschild <vehreschild@sc.rwth-aachen.de>
% © 2009-2013 Johannes Willkomm <johannes.willkomm@sc.tu-darmstadt.de>
% RWTH Aachen University, 52056 Aachen, Germany
% TU Darmstadt, 64289 Darmstadt, Germany
% Visit us on the web at http://www.adimat.de/
% Report bugs to adimat-users@lists.sc.informatik.tu-darmstadt.de
%
%  
    
function [d_r r] = d_adimat_norm2(d_x, x, d_p, p)
% r = norm(x, p);
   r = [];
   d_r = d_zeros(r);
   tmpca3 = [];
   d_tmpca3 = d_zeros(tmpca3);
   tmpca2 = [];
   d_tmpca2 = d_zeros(tmpca2);
   tmpca1 = [];
   d_tmpca1 = d_zeros(tmpca1);
   answer = [];
   a = [];
   d_a = d_zeros(a);
   sa2 = [];
   d_sa2 = d_zeros(sa2);
   s = [];
   d_s = d_zeros(s);
   if ischar(p)
      if strcmp(lower(p), 'fro')
         d_tmpca3 = adimat_diff_conj(adimat_opdiff_subsref(d_x, struct('type', '()', 'subs', {{':'}})), x(:));
         tmpca3 = conj(x(:));
         d_tmpca2 = adimat_opdiff_emult(adimat_opdiff_subsref(d_x, struct('type', '()', 'subs', {{':'}})), x(:), d_tmpca3, tmpca3);
         tmpca2 = x(:) .* tmpca3;
         d_tmpca1 = adimat_diff_sum1(d_tmpca2, tmpca2);
         tmpca1 = sum(tmpca2);
         [d_r r] = adimat_diff_sqrt(d_tmpca1, tmpca1);
      else
         error('Only "fro" is a valid string for p-norm computation currently.');
      end