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1 // PR c++/58170
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2 // { dg-require-effective-target c++11 }
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3 // { dg-prune-output "not declared" }
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4 // { dg-prune-output "expected" }
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5
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6 template <typename T, typename U>
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7 struct base {
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8 template <typename V>
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9 struct derived;
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10 };
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11
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12 template <typename T, typename U>
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13 template <typename V>
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14 struct base<T, U>::derived : public base<T, V> {
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15 };
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16
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17 // This (wrong?) alias declaration provokes the crash.
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18 template <typename T, typename U, typename V>
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19 using alias = base<T, U>::derived<V>; // { dg-error "template|typename" }
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20
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21 // This one works:
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22 // template <typename T, typename U, typename V>
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23 // using alias = typename base<T, U>::template derived<V>;
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24
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25 template <typename T>
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26 void f() {
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27 alias<T, bool, char> m{};
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28 (void) m;
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29 }
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30
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31 int main() {
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32 f<int>();
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33 }
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