From 9ec4de1160ceaced881e10a8cade406e99257cab Mon Sep 17 00:00:00 2001
From: Jim Powers <jim@corruptmemory.com>
Date: Thu, 26 Mar 2015 13:38:05 -0400
Subject: [PATCH] Added filter to remove duplicate elements when merging

---
 src/main/scala/TMap.scala | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/scala/TMap.scala b/src/main/scala/TMap.scala
index f0e40b2..ae750be 100644
--- a/src/main/scala/TMap.scala
+++ b/src/main/scala/TMap.scala
@@ -16,8 +16,8 @@ class TMap[+T] private(private val values: List[(Type, Any)]) {
   Concatenate two TMaps.
   Elements of the left one override 
   */
-  def ++[S](other: TMap[S])
-    = new TMap[T with S](other.values ++ values)
+  def ++[S](other: TMap[S])(implicit tt: TypeTag[S])
+    = new TMap[T with S](other.values ++ values.filterNot(_._1 <:< tt.tpe))
 
   override def toString = "TMap("+values.toString+")"
 }