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module type FUNCTOR = sig
type 'a t
end
type (+'a, 't) io
type 't state = {
bind : 'a 'b. ('a, 't) io -> ('a -> ('b, 't) io) -> ('b, 't) io;
return : 'a. 'a -> ('a, 't) io;
}
module type X = sig
type 'a s
type t
external inj : 'a s -> ('a, t) io = "%identity"
external prj : ('a, t) io -> 'a s = "%identity"
end
module Common = struct
type t
external inj : 'a -> 'b = "%identity"
external prj : 'a -> 'b = "%identity"
end
module Make (T : FUNCTOR) = struct
type 'a s = 'a T.t
include Common
end
module type FLOW = sig
type backend
type flow
val input : flow -> bytes -> int -> int -> (int, backend) io
end
module type DNS = sig
type backend
type t
type error =
[ `Msg of string
| `No_data of [ `raw ] Domain_name.t * Dns.Soa.t
| `No_domain of [ `raw ] Domain_name.t * Dns.Soa.t ]
val getrrecord :
t ->
'v Dns.Rr_map.rr ->
'a Domain_name.t ->
(('v, [> error ]) result, backend) io
end