Module Async_kernel__Eager_deferred_or_error

type 'a t = 'a Core_kernel.Or_error.t Async_kernel.Deferred.t
include Core_kernel.Monad.S with type t := a t
type 'a t
include Base__.Monad_intf.S_without_syntax with type t := a t
type 'a t
include Base__.Monad_intf.Infix with type t := a t
type 'a t
val (>>=) : 'a t ‑> ('a ‑> 'b t) ‑> 'b 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 t ‑> ('a ‑> 'b) ‑> 'b t

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

module Monad_infix : Base__.Monad_intf.Infix with type t := a t
val bind : 'a t ‑> f:('a ‑> 'b t) ‑> 'b t

bind t ~f = t >>= f

val return : 'a ‑> 'a t

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

val map : 'a t ‑> f:('a ‑> 'b) ‑> 'b t

map t ~f is t >>| f.

val join : 'a t t ‑> 'a t

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

val ignore_m : 'a t ‑> unit 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 Pervasives.ignore. Some monads still do let ignore = ignore_m for historical reasons.

val all : 'a t list ‑> 'a list t
val all_unit : unit t list ‑> unit t
val all_ignore : unit t list ‑> unit t
  • Deprecated [since 2018-02] Use [all_unit]
include Base__.Monad_intf.Syntax with type t := a t
type 'a t
module Let_syntax : sig ... end
val fail : Core_kernel.Error.t ‑> _ t
val ok_unit : unit t
val ignore : _ t ‑> unit t
val ok_exn : 'a t ‑> 'a Async_kernel.Deferred.t
val of_exn : exn ‑> _ t
val of_exn_result : ('a, exn) Core_kernel.Result.t Async_kernel.Deferred.t ‑> 'a t
val error : string ‑> 'a ‑> ('a ‑> Core_kernel.Sexp.t) ‑> _ t
val error_s : Core_kernel.Sexp.t ‑> _ t
val error_string : string ‑> _ t
val errorf : ('a, unit, string, _ tCore_kernel.format4 ‑> 'a
val tag : 'a t ‑> tag:string ‑> 'a t
val tag_arg : 'a t ‑> string ‑> 'b ‑> ('b ‑> Core_kernel.Sexp.t) ‑> 'a t
val unimplemented : string ‑> _ t
val find_map_ok : 'a list ‑> f:('a ‑> 'b t) ‑> 'b t
val try_with : ?⁠extract_exn:bool ‑> ?⁠here:Lexing.position ‑> ?⁠name:string ‑> (unit ‑> 'a Async_kernel.Deferred.t) ‑> 'a t

Note that try_with f is eager only in the Ok case.

val try_with_join : ?⁠extract_exn:bool ‑> ?⁠here:Lexing.position ‑> ?⁠name:string ‑> (unit ‑> 'a t) ‑> 'a t

Note that try_with_join f is eager only when no exception is raised by f.