Can I use nested type in Scala generic function? -

how can use nested type in scala generic function ? i'd implement this

implicit def basicdblist2list[list[a]](value : basicdblist) = value.tolist.asinstanceof[list[a]] 

compiler gives following error:

scala: not found: type   implicit def basicdblist2list[list[a]](value : basicdblist) = value.tolist.asinstanceof[list[a]]                                                                                                ^ 

when write:

implicit def basicdblist2list[list[a]](value: basicdblist) = ... 

... doesn't mean think means. you're declaring new type parameter called list, not referring existing list trait in library! you're declaring newly-defined list type requires type parameter, you've called a, can't reference it.

what meant was:

implicit def basicdblist2list[a](value: basicdblist): list[a] = ... 

... says that, type a, can convert basicdblist list[a].

this sketchy code, though, 2 reasons:

1. what type basicdblist class contain? not possible a. you'll classcastexception @ runtime.
2. why want implicit conversion basicdblist list[a]? that's bad idea.