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This is a really cool SQLite wrapper. One of these things this wrapper lets you do is bind C++ functions/lambdas to ones in SQLite. You can use that functionality in things like SQLite expression indexes, or for customizing a full-text indexer.

One cool example of expression indexes is this: you want to store structured data (e.g. a protobuf) 'natively' in an SQL database, but still give the database visibility into the data stored in that serialized protobuf. You can create an expression index with functions that can read into the protodbuf data and give SQLite that visibility. Another benefit of things like expression indexes is storing comrpessed data. E.g. you want to store a big blob of compressed data, and give SQLite some access to it, but not access to all of it.

In the near future, we'll be transitioning another open-source Trail of Bits project, McSema [1], to using this wrapper. McSema currently stores lots of data in protocol buffers, which isn't very convenient for some reasons. Transitioning over to an SQLite database, hidden behind an API, is going to make things a lot nicer.

[1] https://github.com/trailofbits/mcsema