More fun with -Xmigration.

to BufferLike (++ and similar now create a new collection.)

Removed MapLikeBase.  Annotated all the methods in mutable.{ Map, Set }
which mutated in-place in 2.7 to note that they create new
collections, and implemented same.

At this point the only +/- like method which mutates in place which I am
aware of is BufferLike.+ (see source comment for my observations.)

Also tweaked some collections return types as necessitated by these
changes, such as mutable.Set.clone() now returning "This" rather than
mutable.Set[A].

References #3089, closes #3179. Review by odersky.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/files/run/arybufgrow.scala b/test/files/run/arybufgrow.scala
index 4dccd962f2..35b3233055 100644
--- a/test/files/run/arybufgrow.scala
+++ b/test/files/run/arybufgrow.scala
@@ -3,7 +3,7 @@ import scala.collection.mutable._;
 object Test extends Application {
   val buf = new ArrayBuffer[String];
   for(val i <- List.range(0,1000)) {
-    buf + "hello";
+    buf += "hello";
   }
 
   Console.println("1000 = " + buf.length);