I’d suggest using Pathex for this.
put_in and other *_in functions have one big problem: they don’t work with arbitrary structures, because they expect every structure to implement Access behavior. Most of structures don’t implement it. And even if they do, it introduces unnecessary boilerplate and runtime overhead.
Pathex doesn’t have any of these problems, plus it is declarative, performant, extensible, can to nested sets (like mkdir -p crates intermediary folders, pathex creates intermediary structures), works with tuples, and even has smart things like lenses, filters, etc.
I am using Pathex to maintain complex state in GenServers where there is a lot of logic involved and I also use Pathex to traverse deeply nested structures like parsed HTML, verbose services responses (like ElasticSearch), etc.
