treat more cases for typename

src/uproot/interpretation/known_forth/__init__.py

@@ -5,6 +5,7 @@
 """
 from __future__ import annotations
 
+import uproot
 from uproot.interpretation.known_forth.atlas.element_link import VectorVectorElementLink
 
 KNOWN_FORTH_DICT = {
@@ -20,10 +21,20 @@
 
 
 def known_forth_of(model):
-    if not hasattr(model, "typename"):
-        return
-
-    typename = model.typename
+    """
+    Args:
+        model: The :doc:`uproot.model.Model` to look up known forth for
+
+    Returns an object with attributes `forth_code` and `awkward_form` if a known
+    special case exists, else None
+    """
+    try:
+        typename = model.typename
+    except AttributeError:
+        try:
+            typename = model.classname
+        except AttributeError:
+            typename = uproot.model.classname_decode(model.__name__)
 
     if typename not in KNOWN_FORTH_DICT:
         return

src/uproot/interpretation/objects.py

@@ -47,7 +47,8 @@ class AsObjects(uproot.interpretation.Interpretation):
     replace this interpretation with a faster-to-read equivalent, but not all
     data types can be simplified.
 
-    # TODO: known_forth can define forth code and forms for special cases that will be picked up here as well
+    :doc:`uproot.interpretation.known_forth` defines forth code and forms for
+    special cases that will be picked up here as well
     """
 
     def __init__(self, model, branch=None):