clang/test/CXX/temp/temp.decls/temp.alias/p3.cpp

   1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
   2
   3 // The example given in the standard (this is rejected for other reasons anyway).
   4 template<class T> struct A;
   5 template<class T> using B = typename A<T>::U; // expected-error {{no type named 'U' in 'A<T>'}}
   6 template<class T> struct A {
   7   typedef B<T> U; // expected-note {{in instantiation of template type alias 'B' requested here}}
   8 };
   9 B<short> b;
  10
  11 template<typename T> using U = int;
  12
  13 template<typename ...T> void f(U<T> ...xs);
  14 void g() { f<void,void,void>(1, 2, 3); }
  15
  16 // FIXME: This is illegal, but probably only because CWG1044 missed this paragraph.
  17 template<typename T> using U = U<T>;