TYPE_MODIFIER
{"this", NULL, TYPE_MODIFIER, FLAG_NEXT_LAST_THIS, UNIT_NONE,
{"next", NULL, TYPE_MODIFIER, FLAG_NEXT_LAST_THIS, UNIT_NONE,
{"last", NULL, TYPE_MODIFIER, FLAG_NEXT_LAST_THIS, UNIT_NONE,
if (identifier.type == TYPE_MODIFIER)
return base_type == TYPE_MODIFIER
&& elements[index - 1].type == TYPE_MODIFIER