匿名内部类型的注释

Question

是否可以检索匿名内部类型的注释？ 我在下面有一个示例，可以通过2条路由向下钻取匿名内部类型的字段，而在这两种情况下，在字段field上都找不到注释

object ReflectionBug {


  @native
  val outer:Int = 5

  val nested = new {
    @native
    val field:Int = 4
  }

  def main(args:Array[String]) = {
    val mirror = scala.reflect.runtime.universe.runtimeMirror(ReflectionBug.getClass.getClassLoader)
    val t = mirror.classSymbol(ReflectionBug.getClass)
    val members = t.toType.members
    val annotatedMembers = members.filter(_.annotations.nonEmpty)
    //Outer is incuded with annotation native
    val subs = members.filter(_.typeSignature.typeSymbol.isType).map(s => s -> s.typeSignature.members)
    //'field' members under nested member has no annotations


    val mirror2 = scala.reflect.runtime.universe.runtimeMirror(ReflectionBug.nested .getClass.getClassLoader)
    val t2 = mirror2.classSymbol(ReflectionBug.nested .getClass)
    val members2 = t2.toType.members
    val annotates2 = members2.filter(_.annotations.nonEmpty)
    //annotates2 does not contain field
  }
}

Answer 1

val nested是什么类型？结构类型为AnyRef { val field: Int }

val nested: { val field: Int } = new {
  @native
  val field:Int = 4
}

这就是typeSignature失去注释的原因。

您必须找到成员nested，握住它的右手并使用它。