Added a method ArrayView::copy for shallow copy.

src/TNL/Containers/ArrayView.h

@@ -237,6 +237,15 @@ public:
              typename = std::enable_if_t< std::is_convertible< T, ValueType >::value || IsArrayType< T >::value > >
    ArrayView& operator=( const T& array );
 
+   /**
+    * \brief Shallow copy of the array view
+    * 
+    * \param view Reference to the source array view.
+    * \return Reference to this array view.
+    */
+   __cuda_callable__
+   ArrayView& copy( const ArrayView& view );
+
    /**
     * \brief Swaps this array view with another.
     *

src/TNL/Containers/ArrayView.hpp

@@ -118,6 +118,19 @@ operator=( const T& data )
    return *this;
 }
 
+template< typename Value,
+           typename Device,
+           typename Index >
+__cuda_callable__
+ArrayView< Value, Device, Index >&
+ArrayView< Value, Device, Index >::
+copy( const ArrayView& view )
+{
+   data = view.data;
+   size = view.size;
+   return *this;
+}
+
 template< typename Value,
           typename Device,
           typename Index >