[Vc] Move the specialization of IsNumber to new vc header.

dune/common/simd.hh

@@ -492,22 +492,6 @@ namespace Dune
   }
 #endif // HAVE_VC
 
-#if HAVE_VC
-  /*
-   * Specialize IsNumber for Vc::SimdArray and Vc::Vector to be able to use
-   * it as a scalar in DenseMatrix etc.
-   */
-  template <typename T, std::size_t N>
-  struct IsNumber<Vc::SimdArray<T, N>>
-    : public std::integral_constant<bool, IsNumber<T>::value> {
-  };
-
-  template <typename T, typename Abi>
-  struct IsNumber<Vc::Vector<T, Abi>>
-    : public std::integral_constant<bool, IsNumber<T>::value> {
-  };
-#endif // HAVE_VC
-
 } // end namespace Dune
 
 #endif // DUNE_COMMON_SIMD_HH

dune/common/simd/vc.hh

@@ -504,6 +504,21 @@ namespace Dune {
 
     } // namespace Overloads
   } // namespace Simd
+
+  /*
+   * Specialize IsNumber for Vc::SimdArray and Vc::Vector to be able to use
+   * it as a scalar in DenseMatrix etc.
+   */
+  template <typename T, std::size_t N>
+  struct IsNumber<Vc::SimdArray<T, N>>
+    : public std::integral_constant<bool, IsNumber<T>::value> {
+  };
+
+  template <typename T, typename Abi>
+  struct IsNumber<Vc::Vector<T, Abi>>
+    : public std::integral_constant<bool, IsNumber<T>::value> {
+  };
+
 } // namespace Dune
 
 #endif // DUNE_COMMON_SIMD_VC_HH