Util_pure.Option
type 'a t = 'a Stdlib.Option.t
val bind : ('a -> 'b option) -> 'a option -> 'b option
val to_bool : 'a option -> bool
val traverse_list : ('a -> 'b option) -> 'a list -> 'b list option
val fold : 'a -> ('b -> 'a) -> 'b option -> 'a
val fold' : (unit -> 'a) -> ('b -> 'a) -> 'b option -> 'a
module Infix : sig ... end
A combination of Infix and Let (for let* etc.)
module Letsfix : sig ... end