classOf []用于更高级别的类型

Question

鉴于class Foo[F[_]]，如何获得Class对象？常用的语法不起作用：

scala> classOf[Foo[_]] 
<console>:9: error: _$1 takes no type parameters, expected: one 
       classOf[Foo[_]] 
         ^

也不对

scala> classOf[Foo[_[_]]] 
<console>:9: error: _$1 does not take type parameters 
       classOf[Foo[_[_]]] 
         ^

Answer 1

啊，对。离开这个万一有人查找它：

scala> classOf[Foo[F] forSome { type F[_] }] 
warning: there were 1 feature warning(s); re-run with -feature for details 
res0: Class[Foo[_[_] <: Any]] = class Foo