Feature request: Add support for logical combination expressions in pure literal dbs

Hi,

Would it be possible to add support for adding logical combination expressions to a pure literal db, just like we have for the normal regex dbs?
Unfortunately, due to performance issues with using the normal regex dbs, I rely on pure literal dbs. But in these I really miss the support for having logical expressions on top of matched literal strings.

Alternative, if you could expose the logical expression functionality, so I could run it myself after the normal hs_scan(...) given a container of matched expression ids.