1.1 Options Constructors and Selectors

procedure
(none) → none?

Returns a none struct representing a None value. The none struct does not receive any arguments.

procedure
(none? v) → boolean?
v : any/c

Returns #t if v is a none struct, #f otherwise.

procedure
(some v) → some?
v : any/c

Returns a some struct representing a Some value containing v.

procedure
(some? v) → boolean?
v : any/c

Returns #t if v is a some struct, #f otherwise.