If you’re interested in language design, please help us polish up the new Delegation RFC draft. This gives us ergonomic and efficient code reuse using the composition pattern while avoiding the downsides of OOP inheritance. It could also allow ergonomic implementation of custom widgets in a pure Rust GUI library.
This was on the 2017 Roadmap in the Traits section, but we didn’t finish the design before the impl period. This draft is limited in scope and much easier to read and understand than the last one.