improve integration of DenseVector into collection framework:

* factor out similarities between *Wrapped and *Ops to *Like
* remove custom builder (use array buffer instead sonce DenseVectors are backed by arrays)
* refactor CanBuildFroms
* make LowPriority implicits to a trait

1 files changed, 9 insertions, 1 deletions

diff --git a/src/main/scala/scalam/package.scala b/src/main/scala/scalam/package.scala
index 76957fe..da0888c 100644
--- a/src/main/scala/scalam/package.scala
+++ b/src/main/scala/scalam/package.scala
@@ -1,8 +1,16 @@
 import breeze.linalg.DenseVector
 import scalam.collection._
+import scala.collection.generic.CanBuildFrom
+import scala.collection.mutable.Builder
 
-package object scalam extends LowPriorityImplicits{
+package object scalam extends LowPriorityImplicits {
   
   implicit def denseVector2Ops[A: ClassManifest](v: DenseVector[A]) = new DenseVectorOps(v)
 
+  implicit def denseVectorBuildFrom[A: ClassManifest]: CanBuildFrom[DenseVector[_], A, DenseVector[A]] =
+    new CanBuildFrom[DenseVector[_], A, DenseVector[A]] {
+      def apply(from: DenseVector[_]): Builder[A, DenseVector[A]] = apply()
+      def apply(): Builder[A, DenseVector[A]] = collection.DenseVectorOps.newBuilder[A]
+    }
+  
 }
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