[ UnpackGrammarLine line_address i;
  for (i = 0 : i < 32 : i++)
  {   line_token-->i = ENDIT_TOKEN;
      line_ttype-->i = ELEMENTARY_TT;
      line_tdata-->i = ENDIT_TOKEN;
  }
  action_to_be = 256*(line_address->0) + line_address->1;
  action_reversed = ((action_to_be & $400) ~= 0);
  action_to_be = action_to_be & $3ff;
  line_address--;
  params_wanted = 0;
  for (i=0::i++)
  {   line_address = line_address + 3;
      if (line_address->0 == ENDIT_TOKEN) break;
      line_token-->i = line_address;
      AnalyseToken(line_address);
      if (found_ttype ~= PREPOSITION_TT) params_wanted++;
      line_ttype-->i = found_ttype;
      line_tdata-->i = found_tdata;
  }
  return line_address + 1;
];