[Zope-CVS] CVS: Products/ZCTextIndex - Index.py:1.1.2.41

[Guido van Rossum]

Update of /cvs-repository/Products/ZCTextIndex
In directory cvs.zope.org:/tmp/cvs-serv8528

Modified Files:
      Tag: TextIndexDS9-branch
	Index.py 
Log Message:
_intersection() would croak on an empty L.


=== Products/ZCTextIndex/Index.py 1.1.2.40 => 1.1.2.41 ===
 
     def _intersection(self, L):
+        if not L:
+            return IIBTree()
         d2w, weight = L[0]
         dummy, result = weightedUnion(IIBTree(), d2w, 1, weight)
         for d2w, weight in L[1:]:
@@ -149,7 +151,7 @@
         return result
 
     def _union(self, L):
-        # XXX This can be optimized, see ParseTree.OrNode.executeQuery()
+        # XXX This can be optimized, see OkapiIndex
         result = IIBTree()
         for d2w, weight in L:
             dummy, result = weightedUnion(result, d2w, 1, weight)