optix/dist/types/update.d.ts

Optix is a data manipulation library that provides optics-like capabilites with a simpler syntax. It features robust Typescript support with minimal type annotations and is smaller and faster than true optics libraries.

import { BuildTypeFromPath, BuildTypeFromPathOptional, GetTypeAtPath, MergeRightWthDepth, PartialIfObject, PathItem } from "./common";
export interface Update {
    <Keys extends readonly [PathItem, ...PathItem[]]>(...keys: Keys): <U>(updater: (curr: U) => U) => <T extends BuildTypeFromPathOptional<PartialIfObject<U>, Keys>>(obj: T) => U extends GetTypeAtPath<T, Keys> ? T : unknown;
}
export interface PolyUpdate {
    <Keys extends readonly [PathItem, ...PathItem[]]>(...keys: Keys): <U>(updater: (curr: any) => U) => <T>(obj: T) => Keys extends [infer _, ...infer Rest] ? MergeRightWthDepth<T, BuildTypeFromPath<PartialIfObject<U>, Keys>, Rest> : U;
}
export declare type _Update = <T, U>(obj: T, path: readonly PathItem[], update: (curr: U) => U) => T;