/Я language (β)/Primitives/Shafted List/

: Supertype ( Shafted List i ) ~ ( List i `P` List i )

> `ryo` : a o . ? `S` ? `AR` a `AR__` Shafted List a `AR` o `AR` o
> `yo` : a o . Shafted List a `AR_____` a `AR____` o `AR____` Shafted List o
> `yokl` : a o . Shafted List a `AR___` a `AR__` Maybe o `AR__` Maybe ( Shafted List o )
> `yokl` : a o . Shafted List a `AR___` a `AR__` Stops e o `AR__` Stops e ( Shafted List o )
> `yokl` : a o . Shafted List a `AR___` a `AR__` State e o `AR__` State e ( Shafted List o )
> `yokl` : a o . Shafted List a `AR___` a `AR__` World o `AR__` World ( Shafted List o )

> Arrow `har` derive `ha` Forth : Shafted List `C'AR__` List
> Arrow `har` derive `ha` Aback : Shafted List `C'AR__` List
> Scope `har` within `ha` Forth : Shafted List `C'AT__` List
> Scope `har` within `ha` Aback : Shafted List `C'AT__` List