sig
type 'a t = 'a option
type 'a container = 'a t
val length : 'a container -> int
val is_empty : 'a container -> bool
val iter : 'a container -> f:('a -> unit) -> unit
val fold : 'a container -> init:'b -> f:('b -> 'a -> 'b) -> 'b
val exists : 'a container -> f:('a -> bool) -> bool
val for_all : 'a container -> f:('a -> bool) -> bool
val find : 'a container -> f:('a -> bool) -> 'a option
val to_list : 'a container -> 'a list
val to_array : 'a container -> 'a array
type 'a monad = 'a t
val ( >>= ) : 'a monad -> ('a -> 'b monad) -> 'b monad
val ( >>| ) : 'a monad -> ('a -> 'b) -> 'b monad
module Monad_infix :
sig
type 'a monad = 'a monad
val ( >>= ) : 'a monad -> ('a -> 'b monad) -> 'b monad
val ( >>| ) : 'a monad -> ('a -> 'b) -> 'b monad
end
val bind : 'a monad -> ('a -> 'b monad) -> 'b monad
val return : 'a -> 'a monad
val map : 'a monad -> f:('a -> 'b) -> 'b monad
val join : 'a monad monad -> 'a monad
val ignore : 'a monad -> unit monad
val unit : unit monad
type 'a sexpable = 'a t
val sexp_of_t : ('a -> Sexplib.Sexp.t) -> 'a sexpable -> Sexplib.Sexp.t
val t_of_sexp : (Sexplib.Sexp.t -> 'a) -> Sexplib.Sexp.t -> 'a sexpable
val is_none : 'a Option.t -> bool
val is_some : 'a Option.t -> bool
val map : 'a Option.t -> f:('a -> 'b) -> 'b Option.t
val call : 'a -> f:('a -> unit) Option.t -> unit
val apply : 'a -> f:('a -> 'b) Option.t -> 'b Option.t
val value : 'a Option.t -> default:'a -> 'a
val value_exn : 'a Option.t -> 'a
val equal : ('a -> 'a -> bool) -> 'a Option.t -> 'a Option.t -> bool
end