From e8286776df792a425c84964d5418778ce8316ff8 Mon Sep 17 00:00:00 2001
From: Joachim Schoeberl <joachim.schoeberl@tuwien.ac.at>
Date: Fri, 19 May 2023 14:45:56 +0200
Subject: [PATCH] hash-table with optional Get

---
 libsrc/general/hashtabl.hpp | 9 +++++++++
 libsrc/meshing/bisect.cpp   | 7 ++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/libsrc/general/hashtabl.hpp b/libsrc/general/hashtabl.hpp
index 5ed31517..34c3f641 100644
--- a/libsrc/general/hashtabl.hpp
+++ b/libsrc/general/hashtabl.hpp
@@ -772,6 +772,15 @@ public:
     int pos = Position0 (ahash);
     return (pos != -1);
   }
+
+  inline optional<T> GetIfUsed (const INDEX_2 & ahash) const
+  {
+    int pos = Position0 (ahash);
+    if (pos != -1)
+      return cont[pos];
+    else
+      return nullopt;
+  }
     
   inline void SetData0 (int pos, const INDEX_2 & ahash, const T & acont)
   {
diff --git a/libsrc/meshing/bisect.cpp b/libsrc/meshing/bisect.cpp
index 7f281f8e..0347814c 100644
--- a/libsrc/meshing/bisect.cpp
+++ b/libsrc/meshing/bisect.cpp
@@ -3279,10 +3279,16 @@ namespace netgen
 		  edge.Sort();
 
 		  PointIndex newp;
+                  /*
 		  if (cutedges.Used (edge))
 		    {
 		      newp = cutedges.Get(edge);
 		    }
+                  */
+                  if (auto optnewp = cutedges.GetIfUsed(edge))
+                    {
+                      newp = *optnewp;
+                    }
 		  else
 		    {
 		      Point<3> npt = Center (mesh.Point (edge.I1()),
@@ -3296,7 +3302,6 @@ namespace netgen
 
 		  mtets.Elem(i) = newtet1;
 		  mtets.Append (newtet2);
-
 		  mesh.mlparentelement.Append (i);
 		}
             NgProfiler::StopTimer (timer_bisecttet);