Backup and restore facilities

Added backup and restore facilities for grid and dofvector. Either call

problemStat.backup(adaptInfo);

(This will backup the files to [name]->backup->grid and [name]->backup->solution) and instead of initialize() call the function

problemStat.restore(INIT_ALL);

(This will read the grid and solution from the files [name]->restore->grid and [name]->restore->solution)

Or you can call

problemStat.backup(filename)

and

problemStat.restore(filename) -> std::unique_ptr<Grid>

directly to backup and restore the grid of the problemStat and dofvector.backup(filename) and dofvector.restore(filename) to backup and restore the data of the dofvector.

If the grid does not support backup-restore, the current gridView is written. This means that the hierarchy information is lost. A warning is printed in this case.

src/amdis/common/FieldMatVec.hpp

@@ -255,6 +255,10 @@ namespace Dune
 
 
   /// Dot-product with the vector itself
+  template <class T,
+    std::enable_if_t<Dune::IsNumber<T>::value, int> = 0>
+  auto unary_dot(T const& x);
+
   template <class T, int N>
   auto unary_dot(FieldVector<T, N> const& x);
 
@@ -303,6 +307,10 @@ namespace Dune
   /** \ingroup vector_norms
    *  \brief The euklidean 2-norm of a vector = sqrt( sum_i |x_i|^2 )
    **/
+  template <class T,
+    std::enable_if_t<Dune::IsNumber<T>::value, int> = 0>
+  auto two_norm(T const& x);
+
   template <class T, int N>
   auto two_norm(FieldVector<T, N> const& x);
 
@@ -330,6 +338,10 @@ namespace Dune
   // ----------------------------------------------------------------------------
 
   /// The euklidean distance between two vectors = |lhs-rhs|_2
+  template <class T,
+    std::enable_if_t<Dune::IsNumber<T>::value, int> = 0>
+  T distance(T const& lhs, T const& rhs);
+
   template <class T, int N>
   T distance(FieldVector<T, N> const& lhs, FieldVector<T, N> const& rhs);