Allow copy construction again

diff --git a/include/deal.II/grid/tria_accessor.h b/include/deal.II/grid/tria_accessor.h
index 7e8f41ad130fd0cc67bb27618d4d87fcd8b02c13..f3541bb3f7e3877e7725b8511e9e0d5701c48da8 100644 (file)
--- a/include/deal.II/grid/tria_accessor.h
+++ b/include/deal.II/grid/tria_accessor.h
@@ -721,12 +721,13 @@ public:
                const AccessorData *                local_data = nullptr);
 
   /**
-   * Similar to the copy assignment operator the copy constructor is deleted.
+   * The copy constructor is not deleted but copied constructed elements should
+   * not be modified, also the comments to the copy assignemtn operator.
    */
-  TriaAccessor(const TriaAccessor &) = delete;
+  TriaAccessor(const TriaAccessor &) = default;
 
   /**
-   * Move construction is still allowed.
+   * Move constructor.
    */
   TriaAccessor(TriaAccessor &&) = default;