Method addObserver

packages/effect/src/internal/effect.ts:560–572

(cb: (exit: Exit.Exit<A, E>) => void)

    return Context.get(this.context, ref)
  }
  addObserver(cb: (exit: Exit.Exit<A, E>) => void): () => void {
    if (this._exit) {
      cb(this._exit)
      return constVoid
    }
    this._observers.push(cb)
    return () => {
      const index = this._observers.indexOf(cb)
      if (index >= 0) {
        this._observers.splice(index, 1)
      }
    }
  }
  interruptUnsafe(fiberId?: number | undefined, annotations?: Context.Context<never> | undefined): void {
    if (this._exit) {
      return