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// PR c++/33964
template<typename T>
struct X { };
template<typename T>
struct X<typename T::foo> { }; // { dg-error "not used|T" }
template<int N>
struct X<int[N]> {}; // okay
template<typename T, typename T::foo V>
struct Y { };
template<typename T, typename U, U v>
struct Y<T, v> { }; // { dg-error "not used|U" }
template<typename T, T V>
struct Z { };
template<typename T>
struct Z<T, (T)0> { }; // { dg-error "involves template parameter" }
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