Spans and positions are not implemented. Positions will depend on tokenization.
Anything more detailed than one *(2) two are arbitrarily dependent on the tokenization. An identifier and pattern matching, or dual FTS and ID tokenization, might be the answer in these cases.
term[^] - start term[$] - end term[position]
These are of possible use but excluded for now. Lucene surround extensions:
and(terms etc) 99w(terms etc) 97n(terms etc)