module Transform: sig .. end
val string_to_item  : unit -> (string, Biocaml_lines.item) Biocaml_transform.t 
Return a transform that converts a stream of arbitrary strings
 to a stream of lines. If the input terminates without a newline,
 the trailing string is still considered a line.
val group2  : unit ->
 (Biocaml_lines.item,
 (Biocaml_lines.item * Biocaml_lines.item, [> `premature_end_of_input ])
 Core.Std.Result.t)
 Biocaml_transform.t 
Return a transform that converts a stream of lines to a stream
 of pairs of lines. It is considered an error if input ends with an
 odd number of lines.
val item_to_string  : ?buffer:[ `clear of int | `reset of int ] ->
 unit -> (Biocaml_lines.item, string) Biocaml_transform.t 
val make  : ?name:string ->
 ?filename:string ->
 next:(Biocaml_lines.Buffer.t ->
 [ `not_ready | `output of ('b, 'errnext) Core.Result.t ]) ->
 on_error:([ `incomplete_input of
 Biocaml_pos.t * Biocaml_lines.item list * string option
 | `next of 'errnext ] -> 'err) ->
 unit -> (string, ('b, 'err) Core.Result.t) Biocaml_transform.t 
Build a stoppable line-oriented parsing_buffer.
val make_merge_error  : ?name:string ->
 ?filename:string ->
 next:(Biocaml_lines.Buffer.t ->
 [ `not_ready
 | `output of
 ('a,
 [> `incomplete_input of
 Biocaml_pos.t * Biocaml_lines.item list * string option ]
 as 'b)
 Core.Result.t ]) ->
 unit -> (string, ('a, 'b) Core.Result.t) Biocaml_transform.t 
Do like make but merge `incomplete_input _ with the
 errors of ~next (which must be polymorphic variants).