clang/test/SemaCXX/PR31422.cpp

   1 // RUN: %clang_cc1 -std=c++14 -fsyntax-only -verify %s
   2
   3 // 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'}}
   4 // expected-error@+2 {{conversion function cannot convert to a function type}}
   5 struct S {
   6   template <typename... Ts> operator auto()(Ts &&... xs) const;
   7 };