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
