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

: ( Scrolling List ) ~ ( Alone `P'T'I'TT'I` Shafted List )
: Supertype ( Scrolling List i ) ~ ( Alone i `P` Shafted List i )

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

> Arrow `har` derive `ha` Adapt : Scrolling List `C'AR__` Nonempty List
> Arrow `har` derive `ha` Adapt : Scrolling List `C'AR__` Scrolling Tree
> Scope `har` within `ha` Shaft : Scrolling List `C'AT__` Shafted List
> Scope `har` within `ha` Front : Scrolling List `C'AT__` Alone
> Event `har` happen `ha` Forth : Scrolling List `C'TR__` Maybe
> Event `har` happen `ha` Aback : Scrolling List `C'TR__` Maybe