From 04a9026d37f35f32b3539f21c85cd2e594530ad8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Loriot?= <sebastien.loriot@cgal.org>
Date: Wed, 28 Jun 2023 09:58:07 +0200
Subject: [PATCH] make sure the iterator is bidirectional

(even if it's not strictly conforming to the C++ standard)
---
 STL_Extension/include/CGAL/iterator.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/STL_Extension/include/CGAL/iterator.h b/STL_Extension/include/CGAL/iterator.h
index 5e86e9c4561..29780907260 100644
--- a/STL_Extension/include/CGAL/iterator.h
+++ b/STL_Extension/include/CGAL/iterator.h
@@ -43,7 +43,7 @@ class Prevent_deref
     Prevent_deref<I,Value_type>
   , I // base
   , Value_type // value
-  , boost::use_default
+  , typename std::iterator_traits<I>::iterator_category
   , Value_type // ref
   >
 {
@@ -52,7 +52,7 @@ public:
   Prevent_deref<I,Value_type>
   , I // base
   , Value_type // value
-  , boost::use_default
+  , typename std::iterator_traits<I>::iterator_category
   , Value_type // ref
   > Base;
   typedef typename Base::reference reference;