package async_kernel

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package async_kernel
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include sig ... end
include Async_kernel.Invariant.S1 with type 'a t := 'a Async_kernel.Deferred.t
val invariant : ('a -> unit) -> 'a Async_kernel.Deferred.t -> unit
include Core_kernel.Monad with type 'a t := 'a Async_kernel.Deferred.t

t >>= f returns a computation that sequences the computations represented by two monad elements. The resulting computation first does t to yield a value v, and then runs the computation returned by f v.

val (>>|) : 'a Async_kernel.Deferred.t -> ('a -> 'b) -> 'b Async_kernel.Deferred.t

t >>| f is t >>= (fun a -> return (f a)).

module Monad_infix : sig ... end

bind t ~f = t >>= f

val return : 'a -> 'a Async_kernel.Deferred.t

return v returns the (trivial) computation that returns v.

val map : 'a Async_kernel.Deferred.t -> f:('a -> 'b) -> 'b Async_kernel.Deferred.t

map t ~f is t >>| f.

join t is t >>= (fun t' -> t').

ignore_m t is map t ~f:(fun _ -> ()). ignore_m used to be called ignore, but we decided that was a bad name, because it shadowed the widely used Caml.ignore. Some monads still do let ignore = ignore_m for historical reasons.

val all_unit : unit Async_kernel.Deferred.t list -> unit Async_kernel.Deferred.t

Like all, but ensures that every monadic value in the list produces a unit value, all of which are discarded rather than being collected into a list.

val all_ignore : unit Async_kernel.Deferred.t list -> unit Async_kernel.Deferred.t
  • deprecated [since 2018-02] Use [all_unit]
module Let_syntax : sig ... end

These are convenient to have in scope when programming with a monad:

module Infix : sig ... end
val any_unit : unit Async_kernel.Deferred.t list -> unit Async_kernel.Deferred.t
val create : ('a Async_kernel.Ivar.t -> unit) -> 'a Async_kernel.Deferred.t
val don't_wait_for : unit Async_kernel.Deferred.t -> unit
val is_determined : 'a Async_kernel.Deferred.t -> bool
val never : unit -> _ Async_kernel.Deferred.t
val peek : 'a Async_kernel.Deferred.t -> 'a option
val unit : unit Async_kernel.Deferred.t
val upon : 'a Async_kernel.Deferred.t -> ('a -> unit) -> unit
val value_exn : 'a Async_kernel.Deferred.t -> 'a
val repeat_until_finished : 'state -> ('state -> [ `Repeat of 'state | `Finished of 'result ] Async_kernel.Deferred.t) -> 'result Async_kernel.Deferred.t
module List : sig ... end
module Or_error : sig ... end
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