I'm not using a parser I wrote. Though of course someone must maintain it. I considered writing this in C++ to get more tooling (JS parser, C++ AST libraries,

I'm not using a parser I wrote. Though of course someone must maintain it. I considered writing this in C++ to get more tooling (JS parser, C++ AST libraries, etc.) but in the short-term I do not see myself switching. I'd be a little more likely to switch back to D though because I find data structures in Rust annoying.