import { LazyArg } from "@tsplus/stdlib/data/Function";
import { STM } from "@effect/core/stm/STM/definition/base";
import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
/**
 * The moral equivalent of `if (!p) exp` when `p` has side-effects.
 * @tsplus static effect/core/stm/STM.Aspects unlessSTM
 * @tsplus pipeable effect/core/stm/STM unlessSTM
 * @tsplus location "@effect/core/stm/STM/operations/unlessSTM"
 */
export declare function unlessSTM<R2, E2>(predicate: LazyArg<STM<R2, E2, boolean>>): <R, E, A>(self: import("../definition").STM<R, E, A>) => import("../definition").STM<R2 | R, E2 | E, import("@tsplus/stdlib/data/Maybe").Maybe<A>>;
//# sourceMappingURL=unlessSTM.d.ts.map