From de9639cd8b4c776b1deb9fe6158320c28d6de6a1 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 18 Nov 2022 16:03:09 -0700
Subject: [PATCH] Simplify yet more code.

---
 source/base/data_out_base.cc | 47 ++++++++++++++++++++++++------------
 1 file changed, 32 insertions(+), 15 deletions(-)

diff --git a/source/base/data_out_base.cc b/source/base/data_out_base.cc
index 3eea04099d..30889fd792 100644
--- a/source/base/data_out_base.cc
+++ b/source/base/data_out_base.cc
@@ -589,22 +589,37 @@ namespace DataOutBase
     const unsigned int base_entry =
       index * GeometryInfo<dim>::vertices_per_cell;
 
-    internal_add_cell(base_entry + 0, start);
-    if (dim >= 1)
+    switch (dim)
       {
-        internal_add_cell(base_entry + 1, start + d1);
-        if (dim >= 2)
-          {
-            internal_add_cell(base_entry + 2, start + d2 + d1);
-            internal_add_cell(base_entry + 3, start + d2);
-            if (dim >= 3)
-              {
-                internal_add_cell(base_entry + 4, start + d3);
-                internal_add_cell(base_entry + 5, start + d3 + d1);
-                internal_add_cell(base_entry + 6, start + d3 + d2 + d1);
-                internal_add_cell(base_entry + 7, start + d3 + d2);
-              }
-          }
+        case 0:
+          internal_add_cell(base_entry + 0, start);
+          break;
+
+        case 1:
+          internal_add_cell(base_entry + 0, start);
+          internal_add_cell(base_entry + 1, start + d1);
+          break;
+
+        case 2:
+          internal_add_cell(base_entry + 0, start);
+          internal_add_cell(base_entry + 1, start + d1);
+          internal_add_cell(base_entry + 2, start + d2 + d1);
+          internal_add_cell(base_entry + 3, start + d2);
+          break;
+
+        case 3:
+          internal_add_cell(base_entry + 0, start);
+          internal_add_cell(base_entry + 1, start + d1);
+          internal_add_cell(base_entry + 2, start + d2 + d1);
+          internal_add_cell(base_entry + 3, start + d2);
+          internal_add_cell(base_entry + 4, start + d3);
+          internal_add_cell(base_entry + 5, start + d3 + d1);
+          internal_add_cell(base_entry + 6, start + d3 + d2 + d1);
+          internal_add_cell(base_entry + 7, start + d3 + d2);
+          break;
+
+        default:
+          Assert(false, ExcNotImplemented());
       }
   }
 
@@ -3077,6 +3092,8 @@ namespace DataOutBase
     out.flush_cells();
   }
 
+
+
   template <int dim, int spacedim, typename StreamType>
   void
   write_high_order_cells(const std::vector<Patch<dim, spacedim>> &patches,
-- 
2.39.5