| // RUN: %clang_cc1 -std=c++14 -fsyntax-only -verify %s | |
| // expected-error@+3 {{cannot specify any part of a return type in the declaration of a conversion function; use an alias template to declare a conversion to 'auto (Ts &&...) const'}} | |
| // expected-error@+2 {{conversion function cannot convert to a function type}} | |
| struct S { | |
| template <typename... Ts> operator auto()(Ts &&... xs) const; | |
| }; |