val chomp : string -> stringval before : string -> int -> stringval after : string -> int -> stringval first_chars : string -> int -> stringval last_chars : string -> int -> stringval eq_sub_strings : string -> int -> string -> int -> int -> boolval is_prefix : string -> string -> boolval is_suffix : string -> string -> boolval contains_string : string -> int -> string -> int optionval subst : string -> string -> string -> stringval tr : char -> char -> string -> stringval rev : string -> stringval implode : char list -> stringval explode : string -> char listval make : int -> char -> stringval init : int -> (int -> char) -> stringval length : string -> intval get : string -> int -> charval concat : string -> string list -> stringval equal : t -> t -> boolval compare : t -> t -> intval contains_from : string -> int -> char -> boolval rcontains_from : string -> int -> char -> boolval contains : string -> char -> boolval sub : string -> int -> int -> stringval split_on_char : char -> string -> string listval map : (char -> char) -> string -> stringval mapi : (int -> char -> char) -> string -> stringval trim : string -> stringval escaped : string -> stringval uppercase_ascii : string -> stringval lowercase_ascii : string -> stringval capitalize_ascii : string -> stringval uncapitalize_ascii : string -> stringval iter : (char -> unit) -> string -> unitval iteri : (int -> char -> unit) -> string -> unitval index_from : string -> int -> char -> intval index_from_opt : string -> int -> char -> int optionval rindex_from : string -> int -> char -> intval rindex_from_opt : string -> int -> char -> int optionval index : string -> char -> intval index_opt : string -> char -> int optionval rindex : string -> char -> intval rindex_opt : string -> char -> int optionval to_seqi : t -> (int * char) Seq.tval create : int -> bytesval set : bytes -> int -> char -> unitval blit : string -> int -> bytes -> int -> int -> unitval copy : string -> stringval fill : bytes -> int -> int -> char -> unitval uppercase : string -> stringval lowercase : string -> stringval capitalize : string -> stringval uncapitalize : string -> stringval unsafe_get : string -> int -> charval unsafe_set : bytes -> int -> char -> unitval unsafe_blit : string -> int -> bytes -> int -> int -> unitval unsafe_fill : bytes -> int -> int -> char -> unit