Модуль Lazy_backtrack

module Lazy_backtrack: sig .. end

type ('a, 'b) t 

type log 

val force : ('a -> 'b) -> ('a, 'b) t -> 'b

val create : 'a -> ('a, 'b) t

val get_arg : ('a, 'b) t -> 'a option

val get_contents : ('a, 'b) t -> ('a, 'b) Either.t

val create_forced : 'b -> ('a, 'b) t

val create_failed : exn -> ('a, 'b) t

val log : unit -> log

val force_logged : log ->       ('a -> ('b, 'c) result) ->       ('a, ('b, 'c) result) t -> ('b, 'c) result

val backtrack : log -> unit