Added set that contains everything.

[[Imported from SVN: r5607]]

common/enumset.hh

@@ -34,6 +34,23 @@ namespace Dune
     static bool contains(const Type& attribute);
   };
 
+  /**
+   * @brief An set containing everything.
+   */
+  template<typename TA>
+  class AllSet
+  {
+  public:
+    /**
+     * @brief The POD type the set holds.
+     */
+    typedef TA Type;
+    /**
+     * @brief Always returns false.
+     */
+    static bool contains(const Type& attribute);
+  };
+
   /**
    * @brief A set consisting only of one item.
    */
@@ -100,6 +117,12 @@ namespace Dune
     return false;
   }
 
+  template<typename TA>
+  inline bool AllSet<TA>::contains(const TA& attribute)
+  {
+    return true;
+  }
+
   template<typename TA,int i>
   inline bool EnumItem<TA,i>::contains(const TA& item)
   {