From 638d12593f0a1fab0d51cc635be1dec6192be121 Mon Sep 17 00:00:00 2001
From: Sven Oesau <sven.oesau@geometryfactory.com>
Date: Mon, 1 Dec 2025 15:51:21 +0100
Subject: [PATCH 1/2] adding timestamp to convex_hull_3 vertex and face base

---
 .../include/CGAL/Convex_hull_face_base_2.h        | 15 +++++++++++++++
 .../include/CGAL/Convex_hull_vertex_base_2.h      | 15 +++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/Convex_hull_3/include/CGAL/Convex_hull_face_base_2.h b/Convex_hull_3/include/CGAL/Convex_hull_face_base_2.h
index 7899a0da840..ce9eeb3f81d 100644
--- a/Convex_hull_3/include/CGAL/Convex_hull_face_base_2.h
+++ b/Convex_hull_3/include/CGAL/Convex_hull_face_base_2.h
@@ -18,6 +18,8 @@
 #include <CGAL/license/Convex_hull_3.h>
 
 #include <CGAL/Triangulation_ds_face_base_2.h>
+#include <CGAL/Has_timestamp.h>
+#include <CGAL/Time_stamper.h>
 
 #include <list>
 
@@ -29,6 +31,7 @@ class Convex_hull_face_base_2
   : public Fb
 {
   int _info = 0;
+  std::size_t time_stamp_ = std::size_t(-2);
 
 public:
   typedef typename Fb::Vertex_handle                   Vertex_handle;
@@ -64,6 +67,18 @@ public:
 
   static int ccw(int i) {return Triangulation_cw_ccw_2::ccw(i);}
   static int  cw(int i) {return Triangulation_cw_ccw_2::cw(i);}
+
+  /// For the determinism of Compact_container iterators
+  ///@{
+  typedef Tag_true Has_timestamp;
+
+  std::size_t time_stamp() const {
+    return time_stamp_;
+  }
+  void set_time_stamp(const std::size_t& ts) {
+    time_stamp_ = ts;
+  }
+  ///@}
 };
 
 } //namespace CGAL
diff --git a/Convex_hull_3/include/CGAL/Convex_hull_vertex_base_2.h b/Convex_hull_3/include/CGAL/Convex_hull_vertex_base_2.h
index cef5f5eeac8..6016d65c62b 100644
--- a/Convex_hull_3/include/CGAL/Convex_hull_vertex_base_2.h
+++ b/Convex_hull_3/include/CGAL/Convex_hull_vertex_base_2.h
@@ -19,6 +19,8 @@
 
 #include <CGAL/Triangulation_ds_vertex_base_2.h>
 #include <CGAL/IO/io.h>
+#include <CGAL/Has_timestamp.h>
+#include <CGAL/Time_stamper.h>
 
 #include <iostream>
 
@@ -38,6 +40,7 @@ public:
 private:
   int _info = 0;
   Point _p;
+  std::size_t time_stamp_ = std::size_t(-2);
 
 public:
   template < typename TDS2 >
@@ -65,6 +68,18 @@ public:
 
   const int& info() const { return _info; }
   int&       info()       { return _info; }
+
+  /// For the determinism of Compact_container iterators
+  ///@{
+  typedef Tag_true Has_timestamp;
+
+  std::size_t time_stamp() const {
+    return time_stamp_;
+  }
+  void set_time_stamp(const std::size_t& ts) {
+    time_stamp_ = ts;
+  }
+  ///@}
 };
 
 template <typename GT, typename Vb>

From 7fbee84a0e48403aa307a14b9df527f092936609 Mon Sep 17 00:00:00 2001
From: Sven Oesau <sven.oesau@geometryfactory.com>
Date: Tue, 9 Dec 2025 14:42:38 +0100
Subject: [PATCH 2/2] remove timestamp from Convex_hull_face_base_2

---
 .../include/CGAL/Convex_hull_face_base_2.h      | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/Convex_hull_3/include/CGAL/Convex_hull_face_base_2.h b/Convex_hull_3/include/CGAL/Convex_hull_face_base_2.h
index ce9eeb3f81d..b0055b83f11 100644
--- a/Convex_hull_3/include/CGAL/Convex_hull_face_base_2.h
+++ b/Convex_hull_3/include/CGAL/Convex_hull_face_base_2.h
@@ -18,8 +18,6 @@
 #include <CGAL/license/Convex_hull_3.h>
 
 #include <CGAL/Triangulation_ds_face_base_2.h>
-#include <CGAL/Has_timestamp.h>
-#include <CGAL/Time_stamper.h>
 
 #include <list>
 
@@ -31,7 +29,6 @@ class Convex_hull_face_base_2
   : public Fb
 {
   int _info = 0;
-  std::size_t time_stamp_ = std::size_t(-2);
 
 public:
   typedef typename Fb::Vertex_handle                   Vertex_handle;
@@ -59,7 +56,7 @@ public:
                           Vertex_handle v2,
                           Face_handle   n0,
                           Face_handle   n1,
-                          Face_handle   n2 )
+                          Face_handle   n2)
     : Fb(v0, v1, v2, n0, n1, n2), _info(0) {}
 
   const int& info() const { return _info; }
@@ -67,18 +64,6 @@ public:
 
   static int ccw(int i) {return Triangulation_cw_ccw_2::ccw(i);}
   static int  cw(int i) {return Triangulation_cw_ccw_2::cw(i);}
-
-  /// For the determinism of Compact_container iterators
-  ///@{
-  typedef Tag_true Has_timestamp;
-
-  std::size_t time_stamp() const {
-    return time_stamp_;
-  }
-  void set_time_stamp(const std::size_t& ts) {
-    time_stamp_ = ts;
-  }
-  ///@}
 };
 
 } //namespace CGAL