[common] adds FieldVector variant that's initialized with compile-time constant

dune/stuff/common/fvector.hh

@@ -107,6 +107,21 @@ public:
   }
 }; // class FieldVector
 
+template <class K, int SIZE, K value>
+class ValueInitFieldVector : public Dune::Stuff::Common::FieldVector<K, SIZE>
+{
+  static_assert(SIZE >= 0, "Really?");
+
+  typedef Dune::Stuff::Common::FieldVector<K, SIZE> BaseType;
+  typedef ValueInitFieldVector<K, SIZE, value> ThisType;
+
+public:
+  ValueInitFieldVector()
+    : BaseType(value)
+  {
+  }
+
+}; // class FieldVector
 
 } // namespace Common
 } // namespace Stuff