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      1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
      2 
      3 template<typename T> struct identity;
      4 template<typename ...Types> struct tuple;
      5 
      6 template<typename T, typename U> struct is_same {
      7   static const bool value = false;
      8 };
      9 
     10 template<typename T> struct is_same<T, T> {
     11   static const bool value = true;
     12 };
     13 
     14 // There is a syntactic ambiguity when an ellipsis occurs at the end
     15 // of a parameter-declaration-clause without a preceding comma. In
     16 // this case, the ellipsis is parsed as part of the
     17 // abstract-declarator if the type of the parameter names a template
     18 // parameter pack that has not been expanded; otherwise, it is parsed
     19 // as part of the parameter-declaration-clause.
     20 
     21 template<typename T, typename ...Types>
     22 struct X0 {
     23   typedef identity<T(Types...)> function_pack_1;
     24   typedef identity<T(Types......)> variadic_function_pack_1; // expected-warning {{varargs}} expected-note {{pack}} expected-note {{insert ','}}
     25   typedef identity<T(T...)> variadic_1;
     26   typedef tuple<T(Types, ...)...> template_arg_expansion_1;
     27 };
     28 
     29 
     30 
     31 // FIXME: Once function parameter packs are implemented, we can test all of the disambiguation
     32