import type { Effect } from "./effect"
/**
 * Propagates the success value to the first element of a tuple, but
 * passes the effect input `R` along unmodified as the second element
 * of the tuple.
 */
export declare function onFirst<R, E, A>(
  self: Effect<R, E, A>,
  __trace?: string
): Effect<R, E, import("../Collections/Immutable/Tuple").Tuple<[A, R]>>
//# sourceMappingURL=onFirst.d.ts.map
