Provide an overload for TriaAccess<0,1,spacedim>::copy_from().

diff --git a/include/deal.II/grid/tria_accessor.h b/include/deal.II/grid/tria_accessor.h
index a095c8f36bdf4b30616ed896da25653ba5274e6a..c6f9ff01e46accc05b313f4da72ae24bf542c867 100644 (file)
--- a/include/deal.II/grid/tria_accessor.h
+++ b/include/deal.II/grid/tria_accessor.h
@@ -2384,6 +2384,14 @@ public:
   void
   copy_from(const TriaAccessor &);
 
+  /**
+   * Copy operator. We need this function to support generic
+   * programming, but it just throws an exception because it cannot do
+   * the required operations.
+   */
+  void
+  copy_from(const TriaAccessorBase<0, 1, spacedim> &);
+
   /**
    * Return the state of the iterator. Since an iterator to points can not be
    * incremented or decremented, its state remains constant, and in particular

diff --git a/include/deal.II/grid/tria_accessor.templates.h b/include/deal.II/grid/tria_accessor.templates.h
index 70ad55af027e2d7701477dadac4f54f398cfa391..c93e2713ee582d107a4953b4887028587d89e976 100644 (file)
--- a/include/deal.II/grid/tria_accessor.templates.h
+++ b/include/deal.II/grid/tria_accessor.templates.h
@@ -2769,6 +2769,19 @@ TriaAccessor<0, 1, spacedim>::copy_from(const TriaAccessor &t)
 
 
 
+template <int spacedim>
+inline void
+TriaAccessor<0, 1, spacedim>::copy_from(
+  const TriaAccessorBase<0, 1, spacedim> &)
+{
+  // We cannot convert from TriaAccessorBase to
+  // TriaAccessor<0,1,spacedim> because the latter is not derived from
+  // the former. We should never get here.
+  Assert(false, ExcInternalError());
+}
+
+
+
 template <int spacedim>
 inline bool
 TriaAccessor<0, 1, spacedim>::operator<(