가능한 중복 :
What do <:<, <%<, and =:= mean in Scala 2.8, and where are they documented?스칼라에서 <: <의미는 무엇입니까?
예를 들어,
def toTraversable[B](implicit ev: R <:< TraversableOnce[B]): Traversable[B] =
new ManagedTraversable[B,R] {
val resource = self
override protected def internalForeach[U](resource: R, g : B => U) : Unit =
ev(resource).foreach(g)
}
http://www.scala-lang.org/docu/files/ScalaReference.pdf – Jontatas
이천 다른 중복, http://symbolhound.com/?q=%3C% ([여기] 참조 3A % 3C). –