3 files changed, 19 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/ast/parser/BracePatch.scala b/src/compiler/scala/tools/nsc/ast/parser/BracePatch.scala
index 0ef4374a9b..803f35d9cd 100644
--- a/src/compiler/scala/tools/nsc/ast/parser/BracePatch.scala
+++ b/src/compiler/scala/tools/nsc/ast/parser/BracePatch.scala
@@ -10,3 +10,4 @@ package ast.parser
  *  @param inserted  If true, brace needs to be inserted, otherwise brace needs to be deleted.
  */
 case class BracePatch(off: Int, inserted: Boolean)
+extends Patch(off, if (inserted) Insertion("{") else Deletion(1))
+\ No newline at end of file
diff --git a/src/compiler/scala/tools/nsc/ast/parser/Change.scala b/src/compiler/scala/tools/nsc/ast/parser/Change.scala
new file mode 100644
index 0000000000..12f189ac6b
--- /dev/null
+++ b/src/compiler/scala/tools/nsc/ast/parser/Change.scala
@@ -0,0 +1,10 @@
+/* NSC -- new Scala compiler
+ * Copyright 2005-2010 LAMP/EPFL
+ * @author  Martin Odersky
+ */
+package scala.tools.nsc.ast.parser
+
+abstract class Change
+case class Insertion(text: String) extends Change
+case class Deletion(nchars: Int) extends Change
+
diff --git a/src/compiler/scala/tools/nsc/ast/parser/Patch.scala b/src/compiler/scala/tools/nsc/ast/parser/Patch.scala
new file mode 100644
index 0000000000..a55f84151c
--- /dev/null
+++ b/src/compiler/scala/tools/nsc/ast/parser/Patch.scala
@@ -0,0 +1,8 @@
+/* NSC -- new Scala compiler
+ * Copyright 2005-2010 LAMP/EPFL
+ * @author  Martin Odersky
+ */
+package scala.tools.nsc.ast.parser
+
+class Patch(off: Int, change: Change)
+