Method evaluate

packages/effect/src/Micro.ts:513–538

(effect: Primitive)

  }

  evaluate(effect: Primitive): void {
    if (this._exit) {
      return
    } else if (this._yielded !== undefined) {
      const yielded = this._yielded as () => void
      this._yielded = undefined
      yielded()
    }
    const exit = this.runLoop(effect)
    if (exit === Yield) {
      return
    }

    // the interruptChildren middlware is added in Micro.fork, so it can be
    // tree-shaken if not used
    const interruptChildren = fiberMiddleware.interruptChildren && fiberMiddleware.interruptChildren(this)
    if (interruptChildren !== undefined) {
      return this.evaluate(flatMap(interruptChildren, () => exit) as any)
    }

    this._exit = exit
    for (let i = 0; i < this._observers.length; i++) {
      this._observers[i](exit)
    }
    this._observers.length = 0
  }

  runLoop(effect: Primitive): MicroExit<A, E> | Yield {
    let yielding = false