update Primitives for the 'store in' and 'box' blocks

  - They are not yet exportable.
  - Fix TypeDisjunctions as return types of Primitives.

1 files changed, 13 insertions, 1 deletions

diff --git a/TurtleArt/tatype.py b/TurtleArt/tatype.py
index 164ba2a..86119b6 100644
--- a/TurtleArt/tatype.py
+++ b/TurtleArt/tatype.py
@@ -49,7 +49,19 @@ class Type(object):
 
 class TypeDisjunction(tuple,Type):
     """ Disjunction of two or more Types (from the type hierarchy) """
-    pass
+
+    def __init__(self, iterable):
+        self = tuple(iterable)
+
+
+    def __str__(self):
+        s = ["("]
+        for disj in self:
+            s.append(str(disj))
+            s.append(" or ")
+        s.pop()
+        s.append(")")
+        return "".join(s)
 
 
 TYPE_OBJECT = Type('object', 0)