I don't have a twitter account and don't read links to paywalled services there, so don't know what the complaint is. Ergonomics aren't great for this type of

I don't have a twitter account and don't read links to paywalled services there, so don't know what the complaint is. Ergonomics aren't great for this type of problem, but it's something I almost never run into. Feels like a cooked up example. I've written tree data structures, etc. and never had much issue. ASTs for compilers, no particular drama. Rust is just making you consider whether you really want to do this, is all.