// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++11 void f(); // expected-note{{possible target for call}} void f(int); // expected-note{{possible target for call}} decltype(f) a; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}} expected-error {{variable has incomplete type 'decltype(f())' (aka 'void')}} template<typename T> struct S { decltype(T::f) * f; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}} expected-error {{call to non-static member function without an object argument}} }; struct K { void f(); // expected-note{{possible target for call}} void f(int); // expected-note{{possible target for call}} }; S<K> b; // expected-note{{in instantiation of template class 'S<K>' requested here}} namespace PR13978 { template<typename T> struct S { decltype(1) f(); }; template<typename T> decltype(1) S<T>::f() { return 1; } // This case is ill-formed (no diagnostic required) because the decltype // expressions are functionally equivalent but not equivalent. It would // be acceptable for us to reject this case. template<typename T> struct U { struct A {}; decltype(A{}) f(); }; template<typename T> decltype(typename U<T>::A{}) U<T>::f() {} // This case is valid. template<typename T> struct V { struct A {}; decltype(typename V<T>::A{}) f(); }; template<typename T> decltype(typename V<T>::A{}) V<T>::f() {} }