This one probably doesn't really meet your requirements, but I'm using obsidentify as a kind of real life Pokemon go. Just go for a walk and upload any new plant or critter you can find. It's fun and the observations help biological research.
Afaik rust doesn't have functions like that as they lead to unsafe code that's impossible to check variable lifetimes for. I think OP created the jump function.
It's still the same premise. Harry grows up as an orphan with his aunt and uncle after Voldemort killed his parents. Unaware of magic until he receives the letter from Hogwarts. On the train he meets Hermione and Ron who are not that different from the original, and in the end he has to face Voldemort who's trying to steal the philosophers stone. So selling it as something else is probably not something the author could have gotten away with without legal trouble.