From 7c4123152b61c97613332973dc199644a4e625ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Loriot?= <sebastien.loriot@cgal.org>
Date: Mon, 24 Oct 2022 17:58:52 +0200
Subject: [PATCH] Prevent_deref shall not return a reference to the iterator as
 it can be copied

iterator being taken by copy usually, if a function takes a
an iterator by copy and that function returns the reference
type of the deref operator then a reference to a temporary
will be returned.
---
 STL_Extension/include/CGAL/iterator.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/STL_Extension/include/CGAL/iterator.h b/STL_Extension/include/CGAL/iterator.h
index e395ab3c76f..acc6b5101a6 100644
--- a/STL_Extension/include/CGAL/iterator.h
+++ b/STL_Extension/include/CGAL/iterator.h
@@ -43,6 +43,8 @@ class Prevent_deref
   Prevent_deref<I>
   , I // base
   , I // value
+  , boost::use_default
+  , I
   >
 {
 public:
@@ -50,6 +52,8 @@ public:
   Prevent_deref<I>
   , I // base
   , I // value
+  , boost::use_default
+  , I
   > Base;
   typedef typename Base::reference reference;
   typedef typename std::pair<I, I> range;