Module String_zipper

module String_zipper: String_zipper

type t 

val contents : t -> string

val left_contents : t -> string

val right_contents : t -> string

val insert_before : t -> char -> t

val insert_after : t -> char -> t

val drop_before : t -> (char * t) option

val drop_after : t -> (char * t) option

val drop_all_before : t -> (char list * t) option

val drop_all_after : t -> (char list * t) option

val previous : t -> t option

val next : t -> t option

val first : t -> t

val last : t -> t

val replace_left : t -> string -> t

val replace_right : t -> string -> t

val create : string -> string -> t