// i = C token to the right of type
// returns start index of type
static int tok_leftScanType(LS tok, int i) {
  // first skip ellipsis
  if (subListEq(tok, i-6, ".", "", ".", "", "."))
    i -= 6;
  
  // skip array brackets
  while (eqGet(tok, i-2, "]") && eqGet(tok, i-4, "["))
    i -= 4;
    
  // skip type args
  i = tok_leftScanTypeArgsOpt(tok, i);
  
  print(get(tok, i-2));
  
  // package names / outer classes
  while (isIdentifier(get(tok, i-2))) {
    if (eqGet(tok, i-2, "."))
      i -= 4;
    else
      break;
    S t = get(tok, i-4);
    print(+t);
    if (!isIdentifier(t)) break;
    i -= 4;
  }
  ret i-2;
}