import { LazyArg } from "@tsplus/stdlib/data/Function";
import { Effect } from "@effect/core/io/Effect/definition";
import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
/**
 * The moral equivalent of `if (!p) exp`
 * @tsplus static effect/core/io/Effect.Aspects unless
 * @tsplus pipeable effect/core/io/Effect unless
 * @tsplus location "@effect/core/io/Effect/operations/unless"
 */
export declare function unless(predicate: LazyArg<boolean>): <R, E, A>(self: import("../definition").Effect<R, E, A>) => import("../definition").Effect<R, E, import("@tsplus/stdlib/data/Maybe").Maybe<A>>;
//# sourceMappingURL=unless.d.ts.map