From 04ace95498aa0fcbd5078fa78842878b80b77074 Mon Sep 17 00:00:00 2001
From: mattj <matthieu.jeannin@polytechnique.edu>
Date: Tue, 14 Oct 2025 10:33:50 +0200
Subject: [PATCH] Add missing operator!= for TopologyTree to fix comparison
 error

---
 include/xfac/tree/tree.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/xfac/tree/tree.h b/include/xfac/tree/tree.h
index 42f5b0c..a7d2f33 100644
--- a/include/xfac/tree/tree.h
+++ b/include/xfac/tree/tree.h
@@ -152,6 +152,11 @@ inline bool operator==(TopologyTree const& t1, TopologyTree const& t2)
         );
 }
 
+inline bool operator!=(TopologyTree const& t1, TopologyTree const& t2)
+{
+    return !(t1 == t2);
+}
+
 
 inline TopologyTree makeTuckerTree(int dim, int nBit){
     /// Return a Tucker tree.