Smells like a reinvention/rediscovery of the access side of lenses. I don’t know if Rust’s type system admits lenses to the level you can have them in a language like Haskell, but I’d suggest reading up on them.
The post author works on the druid GUI toolkit, which makes use of Lenses so I imagine they’re aware. I’m not sure whether the implementation of them in druid is or can be as sophisticated as Haskell though.
Keypaths were released in 1994 as part of NeXT’s EOF framework. When was the Haskell lens library released?
https://julesh.com/2018/08/16/lenses-for-philosophers/ identifies lenslike structures in a 1958 work by Kurt Godel.
Well, the Nimrud Lens goes back to 7th century BC. ¯_(ツ)_/¯
Seriously, you gotta stop with the Functional Appropriation: just because something is similar to something in FP doesn’t mean that it’s derivative of or a reinvention of the thing in FP. Particularly if the non-FP thing predates the FP thing.