import type { DeepPath, FnO, OptPathVal, Path, Path0, Path1, Path2, Path3, Path4, Path5, Path6, Path7, Path8, PathVal } from "@thi.ng/api";
import type { UpdateFn } from "./api.js";
/**
 * Similar to {@link defSetterUnsafe}, returns a function to update
 * values at given `path` using provided update `fn`. Paths and the
 * arguments given to the returned function are NOT type checked.
 *
 * @remarks
 * The returned function accepts a single object / array and applies
 * `fn` to given path value (incl. any additional / optional arguments
 * passed) and uses result as new value. Does not modify original state.
 *
 * The type parameter `T` can be used to indicate the type of the nested
 * value to be updated (default: `any`).
 *
 * @example
 * ```ts tangle:../export/def-update-unsafe.ts
 * import { defUpdaterUnsafe } from "@thi.ng/paths";
 *
 * const incB = defUpdaterUnsafe("a.b", (x, n) => x + n);
 * // or
 * // const incB = defUpdaterUnsafe(["a", "b"], (x, n) => x + n);
 *
 * console.log(
 *   incB({ a: { b: 10 } }, 13)
 * );
 * // { a: { b: 23 } }
 * ```
 *
 * @param path -
 * @param fn -
 */
export declare const defUpdaterUnsafe: <T = any>(path: Path, fn: UpdateFn<T, T>) => FnO<T, any>;
/**
 * Type checked version of {@link defUpdaterUnsafe}. Only the first 8
 * path levels are type checked.
 *
 * @param path -
 * @param fn -
 */
export declare function defUpdater<T>(path: Path0, fn: UpdateFn<T, T>): FnO<T, T>;
export declare function defUpdater<T, A>(path: Path1<T, A>, fn: UpdateFn<OptPathVal<T, [A]>, PathVal<T, [A]>>): FnO<T, T>;
export declare function defUpdater<T, A, B>(path: Path2<T, A, B>, fn: UpdateFn<OptPathVal<T, [A, B]>, PathVal<T, [A, B]>>): FnO<T, T>;
export declare function defUpdater<T, A, B, C>(path: Path3<T, A, B, C>, fn: UpdateFn<OptPathVal<T, [A, B, C]>, PathVal<T, [A, B, C]>>): FnO<T, T>;
export declare function defUpdater<T, A, B, C, D>(path: Path4<T, A, B, C, D>, fn: UpdateFn<OptPathVal<T, [A, B, C, D]>, PathVal<T, [A, B, C, D]>>): FnO<T, T>;
export declare function defUpdater<T, A, B, C, D, E>(path: Path5<T, A, B, C, D, E>, fn: UpdateFn<OptPathVal<T, [A, B, C, D, E]>, PathVal<T, [A, B, C, D, E]>>): FnO<T, T>;
export declare function defUpdater<T, A, B, C, D, E, F>(path: Path6<T, A, B, C, D, E, F>, fn: UpdateFn<OptPathVal<T, [A, B, C, D, E, F]>, PathVal<T, [A, B, C, D, E, F]>>): FnO<T, T>;
export declare function defUpdater<T, A, B, C, D, E, F, G>(path: Path7<T, A, B, C, D, E, F, G>, fn: UpdateFn<OptPathVal<T, [A, B, C, D, E, F, G]>, PathVal<T, [A, B, C, D, E, F, G]>>): FnO<T, T>;
export declare function defUpdater<T, A, B, C, D, E, F, G, H>(path: Path8<T, A, B, C, D, E, F, G, H>, fn: UpdateFn<OptPathVal<T, [A, B, C, D, E, F, G, H]>, PathVal<T, [A, B, C, D, E, F, G, H]>>): FnO<T, T>;
export declare function defUpdater<T, A, B, C, D, E, F, G, H>(path: DeepPath<T, A, B, C, D, E, F, G, H>, fn: UpdateFn<any, any>): FnO<T, T>;
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