Batteries user guide : BatOptParse.OptParser

`sig
exception Option_conflict of string
type t
type group
val make :
?usage:string ->
?description:string ->
?version:string ->
?suppress_usage:bool ->
?suppress_help:bool ->
?only_leading_opts:bool ->
?prog:string ->
?formatter:BatOptParse.Formatter.t -> unit -> BatOptParse.OptParser.t
val add :
BatOptParse.OptParser.t ->
?group:BatOptParse.OptParser.group ->
?help:string ->
?hide:bool ->
?short_name:char ->
?short_names:char list ->
?long_name:string ->
?long_names:string list -> 'a BatOptParse.Opt.t -> unit
val add_group :
BatOptParse.OptParser.t ->
?parent:BatOptParse.OptParser.group ->
?description:string -> string -> BatOptParse.OptParser.group
val error :
BatOptParse.OptParser.t ->
?chn:Pervasives.out_channel -> ?status:int -> string -> unit
val usage :
BatOptParse.OptParser.t -> ?chn:Pervasives.out_channel -> unit -> unit
val parse :
BatOptParse.OptParser.t ->
?first:int -> ?last:int -> string array -> string list
val parse_argv : BatOptParse.OptParser.t -> string list
end`