From cb27c528cb3e43ddff66eb1c9b5e0932d2205608 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Mon, 15 Aug 2022 17:29:08 -0600
Subject: [PATCH] [visitor] Add visitLeaf

---
 Lib/fontTools/misc/visitor.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Lib/fontTools/misc/visitor.py b/Lib/fontTools/misc/visitor.py
index b971e7683..347ba6a93 100644
--- a/Lib/fontTools/misc/visitor.py
+++ b/Lib/fontTools/misc/visitor.py
@@ -91,6 +91,9 @@ class Visitor(object):
         for value in obj:
             self.visit(value, *args, **kwargs)
 
+    def visitLeaf(self, obj, *args, **kwargs):
+        pass
+
     def visit(self, obj, *args, **kwargs):
         visitorFunc = self._visitorsFor(obj).get(None, None)
         if visitorFunc is not None:
@@ -101,3 +104,5 @@ class Visitor(object):
             self.visitObject(obj, *args, **kwargs)
         elif isinstance(obj, list):
             self.visitList(obj, *args, **kwargs)
+        else:
+            self.visitLeaf(obj, *args, **kwargs)