typelevel#804 - encoding for Set derivatives as well - test build

dataset/src/main/scala/frameless/TypedEncoder.scala

@@ -17,7 +17,8 @@ import shapeless._
 import shapeless.ops.hlist.IsHCons
 
 import scala.collection.generic.CanBuildFrom
-import scala.collection.immutable.TreeSet
+import scala.collection.immutable.HashSet.HashTrieSet
+import scala.collection.immutable.{ListSet, TreeSet}
 
 abstract class TypedEncoder[T](
     implicit
@@ -497,7 +498,7 @@ object TypedEncoder {
   /**
    * Per #804 - when MapObjects is used in interpreted mode the type returned is Seq, not the derived type used in compilation
    *
-   * This type class offers extensible conversion for more specific types.  By default Seq, List and Vector are supported.
+   * This type class offers extensible conversion for more specific types.  By default Seq, List and Vector for Seq's and Set, TreeSet and HashTrieSet are supported.
    *
    * @tparam C
    */
@@ -521,6 +522,12 @@ object TypedEncoder {
     implicit def setToTreeSet[Y](implicit cbf: CanBuildFrom[Nothing, Y, TreeSet[Y]]) = new CollectionConversion[Set, TreeSet, Y] {
       override def convert(c: Set[Y]): TreeSet[Y] = c.to[TreeSet]
     }
+    implicit def setToListSet[Y](implicit cbf: CanBuildFrom[Nothing, Y, ListSet[Y]]) = new CollectionConversion[Set, ListSet, Y] {
+      override def convert(c: Set[Y]): ListSet[Y] = c.to[ListSet]
+    }
+    implicit def setToTrieSet[Y](implicit cbf: CanBuildFrom[Nothing, Y, HashTrieSet[Y]]) = new CollectionConversion[Set, HashTrieSet, Y] {
+      override def convert(c: Set[Y]): HashTrieSet[Y] = c.to[HashTrieSet]
+    }
   }
 
   implicit def seqEncoder[C[X] <: Seq[X], T](