[Simd::IsStandard] Disarm.

Fixes: #121.

Stop-gap measure to to accept any type in the adaption for standard types.

dune/common/simd/isstandard.hh

@@ -39,6 +39,9 @@ namespace Dune {
 
     //! Which types are subject to the standard SIMD abstraction implementation
     /**
+     * \note This is obsolete, do not use, see
+     *       https://gitlab.dune-project.org/core/dune-common/issues/121#note_44588
+     *
      * This is derive from \c std::true_type if \c T should be handled by the
      * standard SIMD abstraction implementation, otherwise from \c
      * std::false_type.  By default it declares all arithmetic types (as per
@@ -63,7 +66,7 @@ namespace Dune {
      *       little as we can get away with.
      */
     template<class T, class SFINAE = void>
-    struct IsStandard : std::is_arithmetic<T> {};
+    struct IsStandard : std::true_type {};
 
     //! group SIMDStandard
   } // namespace Simd

dune/common/simd/loop.hh

@@ -8,6 +8,7 @@
 #include <ostream>
 
 #include <dune/common/math.hh>
+#include <dune/common/simd/isstandard.hh>
 #include <dune/common/simd/simd.hh>
 #include <dune/common/typetraits.hh>
 
@@ -356,6 +357,13 @@ namespace Dune {
         return out;
       }
     }  //namespace Overloads
+
+
+    // temporary stop-gap measure to get IsStandard out of the way
+    // see https://gitlab.dune-project.org/core/dune-common/issues/121#note_44588
+    template<class T, std::size_t S>
+    struct IsStandard<LoopSIMD<T, S> > : std::false_type {};
+
   }  //namespace Simd
 
 

dune/common/simd/vc.hh

@@ -13,6 +13,7 @@
 #include <dune/common/indices.hh>
 #include <dune/common/simd/base.hh>
 #include <dune/common/simd/defaults.hh> // for anyFalse()
+#include <dune/common/simd/isstandard.hh>
 #include <dune/common/typetraits.hh>
 #include <dune/common/vc.hh>
 
@@ -533,6 +534,14 @@ namespace Dune {
       //! @} group SIMDVc
 
     } // namespace Overloads
+
+    // temporary stop-gap measure to get IsStandard out of the way
+    // see https://gitlab.dune-project.org/core/dune-common/issues/121#note_44588
+    template<class T>
+    struct IsStandard<T, std::enable_if_t<VcImpl::IsVector<T>::value> > :
+      std::false_type
+    {};
+
   } // namespace Simd
 
   /*