From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 8 Dec 2016 04:29:17 +0000 (-0700)
Subject: Allow copying of ArrayViews of length zero.
X-Git-Tag: v8.5.0-rc1~339^2~2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=45ae1547c4a4780b27f47e55cfd53ab89b4c85ac;p=dealii.git

Allow copying of ArrayViews of length zero.
---

diff --git a/include/deal.II/base/array_view.h b/include/deal.II/base/array_view.h
index c9d63d81cf..77c96b02b0 100644
--- a/include/deal.II/base/array_view.h
+++ b/include/deal.II/base/array_view.h
@@ -138,6 +138,8 @@ private:
    * The length of the array this object represents.
    */
   const std::size_t  n_elements;
+
+  friend class ArrayView<const ElementType>;
 };
 
 
@@ -160,8 +162,8 @@ template <typename ElementType>
 inline
 ArrayView<ElementType>::ArrayView(const ArrayView<typename boost::remove_cv<value_type>::type> &view)
   :
-  starting_element (&view[0]),
-  n_elements(view.size())
+  starting_element (view.starting_element),
+  n_elements(view.n_elements)
 {}