export function virtualize(fields) {
  return (Superclass) => {
    class Virtualized extends Superclass {}
    fields.forEach((field) => {
      Virtualized.prototype[field] = function() {
        const prototype = Object.getPrototypeOf(this);
        const className = prototype.constructor.name;
        throw new ReferenceError(
          `"${className}" has undefined pure virtual method "${field}"`
        );
      }
    });
    return Virtualized;
  }
}

export function virtualizeStatic(fields) {
  return (Superclass) => {
    class Virtualized extends Superclass {}
    fields.forEach((field) => {
      Virtualized[field] = function() {
        const prototype = Virtualized.prototype;
        const className = prototype.constructor.name;
        throw new ReferenceError(
          `"${className}" has undefined pure virtual static method "${field}"`
        );
      }
    });
    return Virtualized;
  }
}