Chart.js/types/utils.d.ts

// DeepPartial implementation taken from the utility-types NPM package, which is
// Copyright (c) 2016 Piotr Witek <piotrek.witek@gmail.com> (http://piotrwitek.github.io)
// and used under the terms of the MIT license
export type DeepPartial<T> = T extends Function
  ? T
  : T extends Array<infer U>
  ? _DeepPartialArray<U>
  : T extends object
  ? _DeepPartialObject<T>
  : T | undefined;
  type _DeepPartialArray<T> = Array<DeepPartial<T>>
type _DeepPartialObject<T> = { [P in keyof T]?: DeepPartial<T[P]> };

export type DistributiveArray<T> = [T] extends [unknown] ? Array<T> : never

// From https://stackoverflow.com/a/50375286
export type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends ((k: infer I) => void) ? I : never;