package containers

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package containers
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Unicode String, in UTF8

A unicode string represented by a utf8 bytestring. This representation is convenient for manipulating normal OCaml strings that are encoded in UTF8.

We perform only basic decoding and encoding between codepoints and bytestrings. For more elaborate operations, please use the excellent Uutf.

status: experimental

  • since 2.1
type uchar = Uchar.t
type 'a gen = unit -> 'a option
type 'a sequence = ('a -> unit) -> unit
  • deprecated

    use 'a iter instead

type 'a iter = ('a -> unit) -> unit

Fast internal iterator.

  • since 2.8
type t = private string

A UTF8 string

val equal : t -> t -> bool
val hash : t -> int
val compare : t -> t -> int
val pp : Format.formatter -> t -> unit
val to_string : t -> string

Identity.

exception Malformed of string * int

Malformed string at given offset

val to_gen : ?idx:int -> t -> uchar gen

Generator of unicode codepoints.

  • parameter idx

    offset where to start the decoding.

val to_iter : ?idx:int -> t -> uchar iter

Iterator of unicode codepoints.

  • parameter idx

    offset where to start the decoding.

  • since 2.8
val to_seq : ?idx:int -> t -> uchar sequence
  • deprecated use to_iter or to_std_seq instead
val to_std_seq : ?idx:int -> t -> uchar Seq.t

Iter of unicode codepoints.

  • parameter idx

    offset where to start the decoding.

  • since 2.8
val to_list : ?idx:int -> t -> uchar list

List of unicode codepoints.

  • parameter idx

    offset where to start the decoding.

val fold : ?idx:int -> ('a -> uchar -> 'a) -> 'a -> t -> 'a
val iter : ?idx:int -> (uchar -> unit) -> t -> unit
val n_chars : t -> int

Number of characters.

val n_bytes : t -> int

Number of bytes.

val map : (uchar -> uchar) -> t -> t
val filter_map : (uchar -> uchar option) -> t -> t
val flat_map : (uchar -> t) -> t -> t
val append : t -> t -> t
val concat : t -> t list -> t
val of_std_seq : uchar Seq.t -> t

Build a string from unicode codepoints

  • since 2.8
val of_iter : uchar sequence -> t

Build a string from unicode codepoints

  • since 2.8
val of_seq : uchar sequence -> t
  • deprecated use of_iter or of_std_seq instead
val of_gen : uchar gen -> t
val of_list : uchar list -> t
val of_string_exn : string -> t

Validate string by checking it is valid UTF8.

  • raises Invalid_argument

    if the string is not valid UTF8.

val of_string : string -> t option

Safe version of of_string_exn.

val is_valid : string -> bool

Valid UTF8?

val unsafe_of_string : string -> t

Conversion from a string without validating. CAUTION this is unsafe and can break all the other functions in this module. Use only if you're sure the string is valid UTF8. Upon iteration, if an invalid substring is met, Malformed will be raised.

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