seagull-js/seagull

type NonFunctionPropertyNames<T> = {
  // tslint:disable-next-line:ban-types
  [K in keyof T]: T[K] extends Function ? never : K
}[keyof T]
type NonFunctionProperties<T> = Pick<T, NonFunctionPropertyNames<T>>
// prettier-ignore
export type PublicProperties<T extends new (...args: any) => any> =
    NonFunctionProperties<InstanceType<T>>

// prettier-ignore
export type Constructor<C extends new (...args: any[]) => InstanceType<C>> =
                                  new (...args: any[]) => InstanceType<C>

// prettier-ignore
export type SubclassConstructor<C extends Constructor<C>, T> =
  new (...args: any[]) => InstanceType<C> & T