31 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++112 3void f(); // expected-note{{possible target for call}}4void f(int); // expected-note{{possible target for call}}5decltype(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')}}6 7template<typename T> struct S {8 decltype(T::f) * f; // expected-error {{call to non-static member function without an object argument}}9};10 11struct K { 12 void f();13 void f(int);14};15S<K> b; // expected-note{{in instantiation of template class 'S<K>' requested here}}16 17namespace PR13978 {18 template<typename T> struct S { decltype(1) f(); };19 template<typename T> decltype(1) S<T>::f() { return 1; }20 21 // This case is ill-formed (no diagnostic required) because the decltype22 // expressions are functionally equivalent but not equivalent. It would23 // be acceptable for us to reject this case.24 template<typename T> struct U { struct A {}; decltype(A{}) f(); };25 template<typename T> decltype(typename U<T>::A{}) U<T>::f() {}26 27 // This case is valid.28 template<typename T> struct V { struct A {}; decltype(typename V<T>::A{}) f(); };29 template<typename T> decltype(typename V<T>::A{}) V<T>::f() {}30}31