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// { dg-do compile { target c++11 } }
template<int... Indexes>
struct _Index_tuple { };
template<int _Num, typename _Tuple = _Index_tuple<> >
struct _Build_index_tuple;
template<int _Num, int... _Indexes>
struct _Build_index_tuple<_Num, _Index_tuple<_Indexes...> >
: _Build_index_tuple<_Num - 1,
_Index_tuple<_Indexes..., sizeof...(_Indexes)> >
{
};
template<int... _Indexes>
struct _Build_index_tuple<0, _Index_tuple<_Indexes...> >
{
typedef _Index_tuple<_Indexes...> __type;
};
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