callable.ts

/**
 * Returns the result of calling the function (if it is a function) or the value itself.
 *
 * @example
 *
 * ```ts
 * callable(() => true)
 * // => true
 *
 * callable(false)
 * // => false
 * ```
 */
export const callable = <T>(value: T) =>
  (typeof value === 'function' ? value() : value) as T extends (...args: unknown[]) => infer R ? R : T;