export type Nullable<T> = T | null

// eslint-disable-next-line no-use-before-define, @typescript-eslint/no-empty-interface
interface DeepReadonlyArray<T> extends ReadonlyArray<DeepReadonly<T>> {}

type DeepReadonlyObject<T> = {
  readonly [P in keyof T]: DeepReadonly<T[P]> // eslint-disable-line no-use-before-define
}

export type DeepReadonly<T> = T extends (infer R)[]
  ? DeepReadonlyArray<R>
  : T extends (...args: any[]) => void
  ? T
  : T extends object
  ? DeepReadonlyObject<T>
  : T

export type DeepPartial<T> = Partial<{ [P in keyof T]: DeepPartial<T[P]> }>

export type MergeAndOverride<Parent, Own> = Own & Omit<Parent, keyof Own>