import type { Cause } from "./model";
/**
 * ```haskell
 * ap_ :: Apply f => (f (a -> b), f a) -> f b
 * ```
 *
 * Apply a function to an argument under a type constructor
 *
 * @category Apply
 * @since 1.0.0
 */
export declare const ap_: <E, D>(fab: Cause<(a: E) => D>, fa: Cause<E>) => Cause<D>;
/**
 * ```haskell
 * ap :: Apply f => f a -> f (a -> b) -> f b
 * ```
 *
 * Apply a function to an argument under a type constructor
 *
 * @category Apply
 * @since 1.0.0
 */
export declare const ap: <E>(fa: Cause<E>) => <D>(fab: Cause<(a: E) => D>) => Cause<D>;
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