sig type t [@@immediate] val min : Uchar.t val max : Uchar.t val bom : Uchar.t val rep : Uchar.t val succ : Uchar.t -> Uchar.t val pred : Uchar.t -> Uchar.t val is_valid : int -> bool val of_int : int -> Uchar.t val unsafe_of_int : int -> Uchar.t val to_int : Uchar.t -> int val is_char : Uchar.t -> bool val of_char : char -> Uchar.t val to_char : Uchar.t -> char val unsafe_to_char : Uchar.t -> char val equal : Uchar.t -> Uchar.t -> bool val compare : Uchar.t -> Uchar.t -> int val hash : Uchar.t -> int type utf_decode [@@immediate] val utf_decode_is_valid : Uchar.utf_decode -> bool val utf_decode_uchar : Uchar.utf_decode -> Uchar.t val utf_decode_length : Uchar.utf_decode -> int val utf_decode : int -> Uchar.t -> Uchar.utf_decode val utf_decode_invalid : int -> Uchar.utf_decode val utf_8_byte_length : Uchar.t -> int val utf_16_byte_length : Uchar.t -> int end