From 0f89542e116b02d9c025c9b10a7217e5cfeb95c9 Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Sat, 26 Jul 2025 17:28:41 -0400
Subject: [PATCH] xo-expression xo-reader: type unifier + misc improvements

---
 include/xo/reflect/TypeDescr.hpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/xo/reflect/TypeDescr.hpp b/include/xo/reflect/TypeDescr.hpp
index 53247ad..57deb81 100644
--- a/include/xo/reflect/TypeDescr.hpp
+++ b/include/xo/reflect/TypeDescr.hpp
@@ -518,11 +518,21 @@ namespace xo {
         }; /*TypeDescrBase*/
 
         inline std::ostream &
-        operator<<(std::ostream & os, TypeDescrBase const & x) {
+        operator<<(std::ostream & os, const TypeDescrBase & x) {
             x.display(os);
             return os;
         } /*operator<<*/
 
+        inline std::ostream &
+        operator<<(std::ostream & os, const TypeDescrBase * p) {
+            if (p)
+                p->display(os);
+            else
+                os << "<nullptr>";
+            return os;
+        }
+
+
         /* tag to drive overload resolution */
         struct reflected_types_printer {};