1 files changed, 102 insertions, 0 deletions
diff --git a/clang/test/SemaTemplate/alias-templates.cpp b/clang/test/SemaTemplate/alias-templates.cpp
new file mode 100644
index 0000000..75615ee
--- /dev/null
+++ b/clang/test/SemaTemplate/alias-templates.cpp
@@ -0,0 +1,102 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+
+template<typename S>
+struct A {
+  typedef S B;
+  template<typename T> using C = typename T::B;
+  template<typename T> struct D {
+    template<typename U> using E = typename A<U>::template C<A<T>>;
+    template<typename U> using F = A<E<U>>;
+    template<typename U> using G = C<F<U>>;
+    G<T> g;
+  };
+  typedef decltype(D<B>().g) H;
+  D<H> h;
+  template<typename T> using I = A<decltype(h.g)>;
+  template<typename T> using J = typename A<decltype(h.g)>::template C<I<T>>;
+};
+
+A<int> a;
+A<char>::D<double> b;
+
+template<typename T> T make();
+
+namespace X {
+  template<typename T> struct traits {
+    typedef T thing;
+    typedef decltype(val(make<thing>())) inner_ptr;
+
+    template<typename U> using rebind_thing = typename thing::template rebind<U>;
+    template<typename U> using rebind = traits<rebind_thing<U>>;
+
+    inner_ptr &&alloc();
+    void free(inner_ptr&&);
+  };
+
+  template<typename T> struct ptr_traits {
+    typedef T *type;
+  };
+  template<typename T> using ptr = typename ptr_traits<T>::type;
+
+  template<typename T> struct thing {
+    typedef T inner;
+    typedef ptr<inner> inner_ptr;
+    typedef traits<thing<inner>> traits_type;
+
+    template<typename U> using rebind = thing<U>;
+
+    thing(traits_type &traits) : traits(traits), val(traits.alloc()) {}
+    ~thing() { traits.free(static_cast<inner_ptr&&>(val)); }
+
+    traits_type &traits;
+    inner_ptr val;
+
+    friend inner_ptr val(const thing &t) { return t.val; }
+  };
+
+  template<> struct ptr_traits<bool> {
+    typedef bool &type;
+  };
+  template<> bool &traits<thing<bool>>::alloc() { static bool b; return b; }
+  template<> void traits<thing<bool>>::free(bool&) {}
+}
+
+typedef X::traits<X::thing<int>> itt;
+
+itt::thing::traits_type itr;
+itt::thing ith(itr);
+
+itt::rebind<bool> btr;
+itt::rebind_thing<bool> btt(btr);
+
+namespace PR11848 {
+  template<typename T> using U = int;
+
+  template<typename T, typename ...Ts>
+  void f(U<T> i, U<Ts> ...is) { // expected-error {{type 'U<Ts>' (aka 'int') of function parameter pack does not contain any unexpanded parameter packs}}
+    return i + f<Ts...>(is...); // expected-error {{pack expansion does not contain any unexpanded parameter packs}}
+  }
+
+  template<typename ...Ts>
+  struct S {
+    S(U<Ts>...ts); // expected-error {{does not contain any unexpanded parameter packs}}
+  };
+
+  template<typename T>
+  struct Hidden1 {
+    template<typename ...Ts>
+    Hidden1(typename T::template U<Ts> ...ts); // expected-error{{type 'typename Hide::U<Ts>' (aka 'int') of function parameter pack does not contain any unexpanded parameter packs}}
+  };
+
+  template<typename T, typename ...Ts>
+  struct Hidden2 {
+    Hidden2(typename T::template U<Ts> ...ts);
+  };
+
+  struct Hide {
+    template<typename T> using U = int;
+  };
+
+  Hidden1<Hide> h1;  // expected-note{{in instantiation of template class 'PR11848::Hidden1<PR11848::Hide>' requested here}}
+  Hidden2<Hide, double, char> h2(1, 2);
+}