Option (mavkit-libs.Mavryk_error_monad.TzLwtreslib.Option)

type !'a t = 'a option =

| None
| Some of 'a

val none : 'a option

val none_e : ('a option, 'trace) Stdlib.result

val none_s : 'a option Lwt.t

val none_es : ('a option, 'trace) Stdlib.result Lwt.t

val some : 'a -> 'a option

val some_unit : unit option

val some_unit_e : (unit option, 'error) Stdlib.result

val some_unit_s : unit option Lwt.t

val some_unit_es : (unit option, 'error) Stdlib.result Lwt.t

val some_nil : 'a list option

val some_nil_e : ('a list option, 'error) Stdlib.result

val some_nil_s : 'a list option Lwt.t

val some_nil_es : ('a list option, 'error) Stdlib.result Lwt.t

val some_true : bool option

val some_true_e : (bool option, 'error) Stdlib.result

val some_true_s : bool option Lwt.t

val some_true_es : (bool option, 'error) Stdlib.result Lwt.t

val some_false : bool option

val some_false_e : (bool option, 'error) Stdlib.result

val some_false_s : bool option Lwt.t

val some_false_es : (bool option, 'error) Stdlib.result Lwt.t

val some_e : 'a -> ('a option, 'trace) Stdlib.result

val some_s : 'a -> 'a option Lwt.t

val some_es : 'a -> ('a option, 'trace) Stdlib.result Lwt.t

val value : 'a option -> default:'a -> 'a

val value_e : 'a option -> error:'trace -> ('a, 'trace) Stdlib.result

val value_f : 'a option -> default:(unit -> 'a) -> 'a

val value_fe : 
  'a option ->
  error:(unit -> 'trace) ->
  ('a, 'trace) Stdlib.result

val bind : 'a option -> ('a -> 'b option) -> 'b option

val join : 'a option option -> 'a option

val either : 'a option -> 'a option -> 'a option

val either_f : 'a option -> (unit -> 'a option) -> 'a option

val merge : ('a -> 'a -> 'a) -> 'a option -> 'a option -> 'a option

val merge_e : 
  ('a -> 'a -> ('a, 'e) Stdlib.result) ->
  'a option ->
  'a option ->
  ('a option, 'e) Stdlib.result

val merge_s : 
  ('a -> 'a -> 'a Lwt.t) ->
  'a option ->
  'a option ->
  'a option Lwt.t

val merge_es : 
  ('a -> 'a -> ('a, 'e) Stdlib.result Lwt.t) ->
  'a option ->
  'a option ->
  ('a option, 'e) Stdlib.result Lwt.t

val map : ('a -> 'b) -> 'a option -> 'b option

val map_s : ('a -> 'b Lwt.t) -> 'a option -> 'b option Lwt.t

val map_e : 
  ('a -> ('b, 'trace) Stdlib.result) ->
  'a option ->
  ('b option, 'trace) Stdlib.result

val map_es : 
  ('a -> ('b, 'trace) Stdlib.result Lwt.t) ->
  'a option ->
  ('b option, 'trace) Stdlib.result Lwt.t

val fold : none:'a -> some:('b -> 'a) -> 'b option -> 'a

val fold_s : none:'a -> some:('b -> 'a Lwt.t) -> 'b option -> 'a Lwt.t

val fold_f : none:(unit -> 'a) -> some:('b -> 'a) -> 'b option -> 'a

val filter : ('a -> bool) -> 'a option -> 'a option

val filter_map : ('a -> 'b option) -> 'a option -> 'b option

val filter_s : ('a -> bool Lwt.t) -> 'a option -> 'a option Lwt.t

val filter_map_s : ('a -> 'b option Lwt.t) -> 'a option -> 'b option Lwt.t

val filter_e : 
  ('a -> (bool, 'e) Stdlib.result) ->
  'a option ->
  ('a option, 'e) Stdlib.result

val filter_map_e : 
  ('a -> ('b option, 'e) Stdlib.result) ->
  'a option ->
  ('b option, 'e) Stdlib.result

val filter_es : 
  ('a -> (bool, 'e) Stdlib.result Lwt.t) ->
  'a option ->
  ('a option, 'e) Stdlib.result Lwt.t

val filter_map_es : 
  ('a -> ('b option, 'e) Stdlib.result Lwt.t) ->
  'a option ->
  ('b option, 'e) Stdlib.result Lwt.t

val filter_ok : ('a, 'e) Stdlib.result option -> 'a option

val filter_error : ('a, 'e) Stdlib.result option -> 'e option

val filter_left : ('a, 'b) Stdlib.Either.t option -> 'a option

val filter_right : ('a, 'b) Stdlib.Either.t option -> 'b option

val iter : ('a -> unit) -> 'a option -> unit

val iter_s : ('a -> unit Lwt.t) -> 'a option -> unit Lwt.t

val iter_e : 
  ('a -> (unit, 'trace) Stdlib.result) ->
  'a option ->
  (unit, 'trace) Stdlib.result

val iter_es : 
  ('a -> (unit, 'trace) Stdlib.result Lwt.t) ->
  'a option ->
  (unit, 'trace) Stdlib.result Lwt.t

val is_none : 'a option -> bool

val is_some : 'a option -> bool

val equal : ('a -> 'a -> bool) -> 'a option -> 'a option -> bool

val compare : ('a -> 'a -> int) -> 'a option -> 'a option -> int

val to_result : none:'trace -> 'a option -> ('a, 'trace) Stdlib.result

val of_result : ('a, 'e) Stdlib.result -> 'a option

val to_list : 'a option -> 'a list

val to_seq : 'a option -> 'a Stdlib.Seq.t

val catch : ?catch_only:(exn -> bool) -> (unit -> 'a) -> 'a option

val catch_o : ?catch_only:(exn -> bool) -> (unit -> 'a option) -> 'a option

val catch_s : 
  ?catch_only:(exn -> bool) ->
  (unit -> 'a Lwt.t) ->
  'a option Lwt.t

val catch_os : 
  ?catch_only:(exn -> bool) ->
  (unit -> 'a option Lwt.t) ->
  'a option Lwt.t