1// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s 2 3template<typename T> struct identity; 4template<typename ...Types> struct tuple; 5 6template<typename T, typename U> struct is_same { 7 static const bool value = false; 8}; 9 10template<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 21template<typename T, typename ...Types> 22struct 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