I guess it's worth pointing out GHC's -XDeriveDataTypeable language extension, this let's the compiler automatically derive the Typeable instance for user defined datatypes. If you want to copy Data.Typeable having something (a macro?) to automagically implemented Typeable goes a long way to aiding usability.
I'm not sure if an equivalent to Haskell's `derive` exists in Rust. I'm rather new here :) Cheers, Danny Gratzer
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