>>406
そういうのを誘導しないからお前はダメなんだよ。

prev.rust-lang.org/ja-JP/faq.html#how-do-rust-traits-compare-to-haskell-typeclasses

How do Rust traits compare to Haskell typeclasses?
Rust traits are similar to Haskell typeclasses, but are currently not as powerful, as Rust cannot express higher-kinded types. Rust’s associated types are equivalent to Haskell type families.