IO (beluga.Support.Gen.IO)

val with_in : 
  ?mode:int ->
  ?flags:Stdlib.open_flag list ->
  string ->
  (char t -> 'a) ->
  'a

val with_lines : 
  ?mode:int ->
  ?flags:Stdlib.open_flag list ->
  string ->
  (string t -> 'a) ->
  'a

val write_str : 
  ?mode:int ->
  ?flags:Stdlib.open_flag list ->
  ?sep:string ->
  string ->
  string t ->
  unit

val write : 
  ?mode:int ->
  ?flags:Stdlib.open_flag list ->
  string ->
  char t ->
  unit

val write_lines : 
  ?mode:int ->
  ?flags:Stdlib.open_flag list ->
  string ->
  string t ->
  unit