Prop validation support real PropType<Interface>

[yoyo930021]

• I have searched through existing issues

Feature Request

Now, we can't support like:

import Vue, { PropType } from 'vue'

type Bar = 'cac' | 'oao'

interface Foo {
  c: Bar
}

export default Vue.extends({
  props: {
    foo: { type: Object as PropType<Foo> },
    bar: { type: String as PropType<Bar> }
  }
})

I think we can try to analysis type recursive.
convert Foo to { c: 'cac' | 'oao' }.