| 1 | // RUN: %clang_cc1 -std=c++11 -verify %s |
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| 2 | |
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| 3 | struct Q { typedef int type; }; |
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| 4 | |
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| 5 | // "The substitution occurs in all types and expressions that are used in [...] |
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| 6 | // template parameter declarations." In particular, we must substitute into the |
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| 7 | // type of a parameter pack that is not a pack expansion, even if we know the |
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| 8 | // corresponding argument pack is empty. |
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| 9 | template<typename T, typename T::type...> void a(T); |
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| 10 | int &a(...); |
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| 11 | int &a_disabled = a(0); |
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| 12 | int &a_enabled = a(Q()); // expected-error {{cannot bind to a temporary of type 'void'}} |
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| 13 | |
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| 14 | template<typename T, template<typename T::type> class ...X> void b(T); |
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| 15 | int &b(...); |
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| 16 | int &b_disabled = b(0); |
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| 17 | int &b_enabled = b(Q()); // expected-error {{cannot bind to a temporary of type 'void'}} |
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| 18 | |
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| 19 | template<typename T, template<typename T::type...> class ...X> void c(T); |
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| 20 | int &c(...); |
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| 21 | int &c_disabled = c(0); |
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| 22 | int &c_enabled = c(Q()); // expected-error {{cannot bind to a temporary of type 'void'}} |
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| 23 | |
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