import type { Either } from "../Either";
import type { Tag } from "../Has";
import type { Option } from "../Option";
import type { Sync } from "../Sync";
import { Managed } from "../Task/Managed/model";
import type { Task } from "../Task/Task";
import type { XPure } from "../XPure";
export declare type _A<T> = [T] extends [
   {
      ["_A"]: () => infer A;
   }
]
   ? A
   : never;
export declare type _R<T> = [T] extends [
   {
      ["_R"]: (_: infer R) => void;
   }
]
   ? R
   : never;
export declare type _E<T> = [T] extends [
   {
      ["_E"]: () => infer E;
   }
]
   ? E
   : never;
export declare const isEither: (u: unknown) => u is Either<unknown, unknown>;
export declare const isOption: (u: unknown) => u is Option<unknown>;
export declare const isTag: (u: unknown) => u is Tag<unknown>;
export declare const isXPure: (u: unknown) => u is XPure<unknown, unknown, unknown, unknown, unknown>;
export declare const isSync: (u: unknown) => u is Sync<unknown, unknown, unknown>;
export declare const isManaged: <R, E, A>(u: Task<R, E, A> | Managed<R, E, A>) => u is Managed<R, E, A>;
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