enum-via-class.ts

// Q: Why not an object literal?
// A: Then you have to create separate constants for the symbols:
//    https://2ality.com/2025/01/typescript-enum-patterns.html#using-symbols-as-property-values

type PropertyValues<Obj> = Obj[keyof Obj];
function createEnum<C extends new (...args: unknown[]) => unknown>(enumClass: C): Omit<C, 'prototype'> {
  return enumClass;
}

const Color = createEnum(class {
  static readonly Red = Symbol('Red');
  static readonly Green = Symbol('Green');
});
type TColor = PropertyValues<typeof Color>;
  // unique symbol | unique symbol

type X = keyof typeof Color;
  // "Red" | "Green"