import { Build } from "./utils";

declare global {
  interface Generator<T = unknown, TReturn = any, TNext = unknown> {
    /**
     * Converts the sequence into an AsyncGenerator for asynchrones processing.
     * @returns A type safe async generator
     */
    async(): AsyncGenerator<T, TReturn, TNext>;
  }

  interface AsyncGenerator<T = unknown, TReturn = any, TNext = unknown> {
    /**
     * Converts the sequence into an AsyncGenerator for asynchrones processing.
     * Present for when you do not know if you sequence is async or not.
     * @returns The original subject.
     */
    async(): AsyncGenerator<T, TReturn, TNext>;
  }
}

Build(
  "async",
  async function* () {
    for (const item of this) {
      yield item;
    }
  },
  function () {
    return this;
  }
);