Internal-lab: Nick Carter

src/main/scala/internal/LoopUntil.scala

@@ -11,6 +11,9 @@ package internal
 object LoopUntil extends App {
 
   // define the new control-flow structure here
+  def loop_until(control: =>Boolean)(body: =>Unit) = {
+    while (!control) body
+  }  
 
   var i = 0
 

src/main/scala/internal/RepeatUntil.scala

@@ -12,7 +12,18 @@ package internal
 object RepeatUntil extends App {
 
   // define the new control-flow structure here
-
+
+  class repeater(body: =>Unit) {
+    def until(control: =>Boolean) = {
+      do body while (!control)
+    }
+  }
+
+  def repeat(body: =>Unit) = {
+    new repeater(body)
+  }
+
+
   var i = 0
   repeat  {
       if ( (i % 2) == 0 )

src/main/scala/internal/WhileContinue.scala

@@ -12,7 +12,22 @@ package internal
 object WhileContinue extends App {
 
   // define the new control-flow structures here
-
+  case class continueException(str:String) extends Exception(str)
+
+  def while_c(control: =>Boolean)(body: =>Unit) = {
+    while (control) {
+      try {
+        body
+      } catch {
+        case e: continueException => Nil
+      }
+    }
+  }
+
+  def continue = {
+    throw new continueException("")
+  }
+
   var i = -1
 
   while_c (i < 9) {