gistfile1.txt

scala> class Foo[A](v:A)(implicit val mf:Manifest[A]){ 
     |   def typeParam = mf.erasure                    
     | }
defined class Foo

scala> (new Foo(99)).typeParam
res2: java.lang.Class[_] = int

scala> (new Foo("HOGE")).typeParam
res3: java.lang.Class[_] = class java.lang.String

scala> class Bar[A,B <:Seq[A]]( x:A,xs:B)(implicit val mfa:Manifest[A], val mfb:Manifest[B]) { 
     |   def typeParams = Seq( mfa.erasure,mfb.erasure )                                      
     | }
defined class Bar

scala> (new Bar("Foo",List("a","b","c"))).typeParams
res4: (Seq[java.lang.Class[_ >: _$1 with _$1]] forSome { type _$1; type _$1 }) = List(class java.lang.String, class scala.collection.immutable.List)