Revert "Provide operator[] for integral_constant<std::size_t, k>"

This commit requires considerably more work (trailing return type and
std::tuple vs. Boost::Fusion).

This reverts commit b61cdfee.

dune/istl/multitypeblockvector.hh

@@ -261,85 +261,8 @@ namespace Dune {
      */
     int count() {return mpl::size<type>::value;}
 
-    /** \brief Random-access operator
-     *
-     * This method mimicks the behavior of normal vector access with square brackets like, e.g., v[5] = 1.
-     * The problem is that the return type is different for each value of the argument in the brackets.
-     * Therefore we implement a trick using std::integral_constant.  To access the first entry of
-     * a MultiTypeBlockVector named v write
-     * \code
-     *  MultiTypeBlockVector<A,B,C,D> v;
-     *  std::integral_constant<int,0> _0;
-     *  v[_0] = ...
-     * \endcode
-     * The name '_0' used here as a static replacement of the integer number zero is arbitrary.
-     * Any other variable name can be used.  If you don't like the separate variable, you can writee
-     * \code
-     *  MultiTypeBlockVector<A,B,C,D> v;
-     *  v[std::integral_constant<int,0>()] = ...
-     * \endcode
-     */
-    template< int index >
-    typename std::tuple_element<index,tupleType>::type&
-    operator[] ( const std::integral_constant< int, index > indexVariable )
-    {
-      DUNE_UNUSED_PARAMETER(indexVariable);
-      return std::get<index>(*this);
-    }
-
-    /** \brief Random-access operator
-     *
-     * This method mimicks the behavior of normal vector access with square brackets like, e.g., v[5] = 1.
-     * The problem is that the return type is different for each value of the argument in the brackets.
-     * Therefore we implement a trick using std::integral_constant.  To access the first entry of
-     * a MultiTypeBlockVector named v write
-     * \code
-     *  MultiTypeBlockVector<A,B,C,D> v;
-     *  std::integral_constant<std::size_t,0> _0;
-     *  v[_0] = ...
-     * \endcode
-     * The name '_0' used here as a static replacement of the integer number zero is arbitrary.
-     * Any other variable name can be used.  If you don't like the separate variable, you can writee
-     * \code
-     *  MultiTypeBlockVector<A,B,C,D> v;
-     *  v[std::integral_constant<std::size_t,0>()] = ...
-     * \endcode
-     */
-    template< std::size_t index >
-    typename std::tuple_element<index,tupleType>::type&
-    operator[] ( const std::integral_constant< std::size_t, index > indexVariable )
-    {
-      DUNE_UNUSED_PARAMETER(indexVariable);
-      return std::get<index>(*this);
-    }
-
-    /** \brief Const random-access operator
-     *
-     * This is the const version of the random-access operator.  See the non-const version for a full
-     * explanation of how to use it.
-     */
-    template< std::size_t index >
-    const typename std::tuple_element<index,tupleType>::type&
-    operator[] ( const std::integral_constant< std::size_t, index > indexVariable ) const
-    {
-      DUNE_UNUSED_PARAMETER(indexVariable);
-      return std::get<index>(*this);
-    }
-
-    /** \brief Const random-access operator
-     *
-     * This is the const version of the random-access operator.  See the non-const version for a full
-     * explanation of how to use it.
-     */
-    template< int index >
-    const typename std::tuple_element<index,tupleType>::type&
-    operator[] ( const std::integral_constant< int, index > indexVariable ) const
-    {
-      DUNE_UNUSED_PARAMETER(indexVariable);
-      return std::get<index>(*this);
-    }
-
-    /** \brief Assignment operator
+    /**
+     * assignment operator
      */
     template<typename T>
     void operator= (const T& newval) {MultiTypeBlockVector_Ident<mpl::size<type>::value,type,T>::equalize(*this, newval); }