/**
 * Fallback to a type if the first type is never. This type allows you to
 * provide a fallback without overriding the source type. For example, when you
 * want to fallback a string literal to a string.
 *
 * @template T The type to wrap.
 * @template U The type to return if T is never.
 * @example Fallback<never, string> // string
 */
type Fallback<T, U> = T[] extends never[] ? U : T;

export type { Fallback };