From 9bb5dc21ca2ca49dd82dc7f90c94816f49b30f61 Mon Sep 17 00:00:00 2001
From: Noam Bernstein <noam.bernstein@nrl.navy.mil>
Date: Thu, 3 Oct 2024 14:10:20 -0400
Subject: [PATCH] Overload '+' operator to concatenate ConfigSet objects

---
 wfl/configset.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/wfl/configset.py b/wfl/configset.py
index 3974c611..c1a6c74a 100644
--- a/wfl/configset.py
+++ b/wfl/configset.py
@@ -388,6 +388,12 @@ def _flat_iter(items):
                     yield at
 
 
+    def __add__(self, other):
+        if not isinstance(other, ConfigSet):
+            raise TypeError(f"unsupported operand type(s) for +: 'ConfigSet' and '{type(other)}'")
+        return ConfigSet([self, other])
+
+
 class OutputSpec:
     """Abstraction for writing to a ConfigSet, preserving tree structure.