static L<S> tok_joinMinusIdentifiers(L<S> tok) {
  for (int i = 1; i+4 < l(tok); i += 2)
    if (isMinusIdentifier(get(tok, i)) && eq(get(tok, i+2), "-") && isIdentifier(get(tok, i+4))) {
      replaceSublist(tok, i, i+5, join(subList(tok, i, i+5)));
      i -= 2;
    }
  ret tok;
}