From: Daniel Arndt <daniel.arndt@iwr.uni-heidelberg.de>
Date: Mon, 28 Jan 2019 13:15:57 +0000 (+0100)
Subject: Declare VectorizedArray::n_array_elemnts outside the class in the general case
X-Git-Tag: v9.1.0-rc1~397^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F7650%2Fhead;p=dealii.git

Declare VectorizedArray::n_array_elemnts outside the class in the general case
---

diff --git a/include/deal.II/base/vectorization.h b/include/deal.II/base/vectorization.h
index 1a6d223e62..3f82e165c5 100644
--- a/include/deal.II/base/vectorization.h
+++ b/include/deal.II/base/vectorization.h
@@ -174,9 +174,11 @@ class VectorizedArray
 {
 public:
   /**
-   * This gives the number of vectors collected in this class.
+   * This gives the number of elements collected in this class. In the general
+   * case, there is only one element. Specializations use SIMD intrinsics and
+   * can work on multiple elements at the same time.
    */
-  static const unsigned int n_array_elements = 1;
+  static const unsigned int n_array_elements;
 
   // POD means that there should be no user-defined constructors, destructors
   // and copy functions (the standard is somewhat relaxed in C++2011, though).
@@ -449,6 +451,10 @@ private:
   std::min(const VectorizedArray<Number2> &, const VectorizedArray<Number2> &);
 };
 
+// We need to have a separate declaration for static const members
+template <typename Number>
+const unsigned int VectorizedArray<Number>::n_array_elements = 1;
+
 
 
 /**