text: import { initMixin } from './init'
  import { stateMixin } from './state'
  import { renderMixin } from './render'
  import { eventsMixin } from './events'
  import { lifecycleMixin } from './lifecycle'
  import { warn } from '../util/index'
  
  function Vue (options) {
    if (process.env.NODE_ENV !== 'production' &&
      !(this instanceof Vue)
    ) {
      warn('Vue is a constructor and should be called with the `new` keyword')
    }
    //预留方法_init
    this._init(options)
  }
  
  initMixin(Vue)
  stateMixin(Vue)
  eventsMixin(Vue)
  lifecycleMixin(Vue)
  renderMixin(Vue)
  
  export default Vue
  