export interface Constructor<T = {}> {
    new(...args: any[]): T;
}

/**
 * Given a Functional constructor (a function that returns an object, but is not meant to be used with `new`), return a Class that can be extended
 *
 * Example:
 * ```js
 * const BaseMoment = makeExtensible(moment);
 * class SubMoment extends BaseMoment { }
 * ```
 */
export function makeExtensible<T>(constructCall: (...args) => T, prototype?: any): Constructor<T> {
    const extensible = function (...args) {
        // Object.assign(this, constructCall(...args));
        Object.setPrototypeOf(this, constructCall(...args) as any)
    }
    extensible.prototype = prototype || (constructCall as any).fn || constructCall.prototype;
    return extensible as any;
}