From 880555e6573fa137ec9ac5e98365e90eb084a53c Mon Sep 17 00:00:00 2001
From: Andreas Fabri <andreas.fabri@geometryfactory.com>
Date: Wed, 24 Jun 2020 15:23:26 +0100
Subject: [PATCH 1/3] Add post-increment iterator

---
 src/pmp/SurfaceMesh.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/src/pmp/SurfaceMesh.h b/src/pmp/SurfaceMesh.h
index 732920c6..61cd1b05 100644
--- a/src/pmp/SurfaceMesh.h
+++ b/src/pmp/SurfaceMesh.h
@@ -261,6 +261,14 @@ class SurfaceMesh
             return *this;
         }
 
+        //! post-increment iterator
+        VertexIterator operator++(int)
+        {
+            VertexIterator tmp = *this;
+            ++(*this);
+            return tmp;
+        }
+
         //! pre-decrement iterator
         VertexIterator& operator--()
         {
@@ -319,6 +327,14 @@ class SurfaceMesh
             return *this;
         }
 
+        //! post-increment iterator
+        HalfedgeIterator operator++(int)
+        {
+            HalfedgeIterator tmp = *this;
+            ++(*this);
+            return tmp;
+        }
+
         //! pre-decrement iterator
         HalfedgeIterator& operator--()
         {
@@ -376,6 +392,14 @@ class SurfaceMesh
             return *this;
         }
 
+        //! post-increment iterator
+        EdgeIterator operator++(int)
+        {
+            EdgeIterator tmp = *this;
+            ++(*this);
+            return tmp;
+        }
+
         //! pre-decrement iterator
         EdgeIterator& operator--()
         {
@@ -433,6 +457,14 @@ class SurfaceMesh
             return *this;
         }
 
+        //! post-increment iterator
+        FaceIterator operator++(int)
+        {
+            FaceIterator tmp = *this;
+            ++(*this);
+            return tmp;
+        }
+
         //! pre-decrement iterator
         FaceIterator& operator--()
         {

From 9f458f4d2078c23a1bb006877ebf2c7601649c5e Mon Sep 17 00:00:00 2001
From: Andreas Fabri <andreas.fabri@geometryfactory.com>
Date: Wed, 24 Jun 2020 15:36:38 +0100
Subject: [PATCH 2/3] Make Section 'Allocate new elements' public and add
 function new_edge()

---
 src/pmp/SurfaceMesh.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/pmp/SurfaceMesh.h b/src/pmp/SurfaceMesh.h
index 732920c6..56472783 100644
--- a/src/pmp/SurfaceMesh.h
+++ b/src/pmp/SurfaceMesh.h
@@ -1785,6 +1785,8 @@ class SurfaceMesh
     };
 
     //!@}
+
+public:
     //! \name Allocate new elements
     //!@{
 
@@ -1802,6 +1804,26 @@ class SurfaceMesh
         return Vertex(vertices_size() - 1);
     }
 
+    //! allocate a new edge, resize edge and halfedge properties accordingly.
+    Halfedge new_edge()
+    {
+        if (halfedges_size() == PMP_MAX_INDEX - 1)
+        {
+            std::cerr << "new_edge: cannot allocate edge, max. index reached"
+                      << std::endl;
+            return Halfedge();
+        }
+
+        eprops_.push_back();
+        hprops_.push_back();
+        hprops_.push_back();
+
+        Halfedge h0(halfedges_size() - 2);
+        Halfedge h1(halfedges_size() - 1);
+
+        return h0;
+    }
+
     //! allocate a new edge, resize edge and halfedge properties accordingly.
     Halfedge new_edge(Vertex start, Vertex end)
     {
@@ -1842,6 +1864,8 @@ class SurfaceMesh
     }
 
     //!@}
+
+private:
     //! \name Helper functions
     //!@{
 

From a8b4454973274427e2baf3c48fd94001915f4aff Mon Sep 17 00:00:00 2001
From: Daniel Sieger <dsieger@posteo.de>
Date: Mon, 17 Aug 2020 12:15:08 +0200
Subject: [PATCH 3/3] Update changelog

---
 CHANGELOG.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3303a148..7d92316b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 This project aims to adhere to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+- Add post-increment iterators and make low level functions to add elements
+  public. This makes it possible to use CGAL algorithms on a PMP SurfaceMesh.
+  Thanks to @afabri for contributing the changes!
+
 ## [1.2.1] 2020-05-10
 
 ### Fixed