.

wcfs/internal/xbtree.py

@@ -113,14 +113,16 @@ def StructureOf(node):
 
 
 
-# TypologyOf returns topology encoding for internal structure of the tree.
+# TypoEncodingOf returns topology encoding for internal structure of the tree.
 #
 # See top-level docstring for what topology is.
-def TypologyOf(tree):
-    1/0
+def TypoEncodingOf(tree):
     treeStruct = StructureOf(tree)
-    # XXX convert struct -> topology
+    return topoEncode(treeStruct)
+
 
+def topoEncode(treeStruct):
+    1/0
 
 
 # ---- misc ----

wcfs/internal/xbtree_test.py

@@ -44,6 +44,8 @@ def test_topologyOf():
                                                 T([], B(7)),
                                                 T([], B(11))) ))
 
+    assert btree.TopoEncodingOf(t) == ((4,), (2,), ø(4), (6,10), ø(5?), ø(7), ø(11), x(5?))
+
     """
     assert xbtree.TopologyOf(t) == ( (4,),
                                      ((2,),      ()),