From 1ee43b9b2414c0a2e476982e069f26bcd39b2544 Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@kdab.com>
Date: Sat, 16 Jan 2016 20:24:03 +0100
Subject: QGraphicsView: Graph: don't compare pointers with op<

It's undefined behavior. Use std::less, which has
defined behavior.

Change-Id: I990d197590cf535c1cb5c055d0b6798e602446dc
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
---
 src/widgets/graphicsview/qgraph_p.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/widgets/graphicsview/qgraph_p.h b/src/widgets/graphicsview/qgraph_p.h
index 1314f6ab36..53701764de 100644
--- a/src/widgets/graphicsview/qgraph_p.h
+++ b/src/widgets/graphicsview/qgraph_p.h
@@ -56,6 +56,8 @@
 #include <QtCore/QString>
 #include <QtCore/QDebug>
 
+#include <functional> // for std::less
+
 #include <float.h>
 
 QT_BEGIN_NAMESPACE
@@ -213,9 +215,8 @@ public:
             Vertex *from = it.from();
             Vertex *to = it.to();
             // do not return (from,to) *and* (to,from)
-            if (from < to) {
+            if (std::less<Vertex*>()(from, to))
                 conns.append(qMakePair(from, to));
-            }
         }
         return conns;
     }
-- 
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