From: Wolfgang Bangerth <bangerth@math.tamu.edu>
Date: Sat, 28 Nov 2015 21:57:16 +0000 (-0600)
Subject: Fix copy constructor of SymmetricTensor.
X-Git-Tag: v8.4.0-rc2~191^2~2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ccb1f90aab7a1113fafe8676509cefcafb6a0669;p=dealii.git

Fix copy constructor of SymmetricTensor.
---

diff --git a/doc/news/changes.h b/doc/news/changes.h
index 5a951c6250..f215637d94 100644
--- a/doc/news/changes.h
+++ b/doc/news/changes.h
@@ -451,6 +451,13 @@ inconvenience this causes.
 
 
 <ol>
+  <li> Fixed: The constructor of SymmetricTensor that takes an array
+  of initializing elements led to a compiler error. This is now
+  fixed.
+  <br>
+  (Wolfgang Bangerth, 2015/11/28)
+  </li>
+
   <li> Fixed: parallel::distributed::Vector now detects if the size of MPI
   messages exceeds 2GB or if the local range exceeds the size of 32-bit
   integers and throws an exception informing about the unsupported sizes.
diff --git a/include/deal.II/base/symmetric_tensor.h b/include/deal.II/base/symmetric_tensor.h
index 2f98689dd3..bd73ad2cd2 100644
--- a/include/deal.II/base/symmetric_tensor.h
+++ b/include/deal.II/base/symmetric_tensor.h
@@ -989,8 +989,13 @@ template <int rank, int dim, typename Number>
 inline
 SymmetricTensor<rank,dim,Number>::SymmetricTensor (const Number (&array) [n_independent_components])
   :
-  data (array)
-{}
+  data (*reinterpret_cast<const typename base_tensor_type::array_type *>(array))
+{
+  // ensure that the reinterpret_cast above actually works
+  Assert (sizeof(typename base_tensor_type::array_type)
+          == sizeof(array),
+          ExcInternalError());
+}