text: // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
  
  // If a template-parameter of a class template or alias template has a default
  // template-argument, each subsequent template-parameter shall either have a
  // default template-argument supplied or be a template parameter pack.
  template<typename> struct vector;
  
  template<typename T = int, typename> struct X3t; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}}
  template<typename T = int, typename> using A3t = int; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}}
  template<int V = 0, int> struct X3nt; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}}
  template<int V = 0, int> using A3nt = int; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}}
  template<template<class> class M = vector, template<class> class> struct X3tt; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}}
  template<template<class> class M = vector, template<class> class> using A3tt = int; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}}
  
  template<typename T = int, typename ...Types> struct X2t;
  template<typename T = int, typename ...Types> using A2t = X2t<T, Types...>;
  template<int V = 0, int ...Values> struct X2nt;
  template<int V = 0, int ...Values> using A2nt = X2nt<V, Values...>;
  template<template<class> class M = vector, template<class> class... Metas>
    struct X2tt;
  template<template<class> class M = vector, template<class> class... Metas>
    using A2tt = X2tt<M, Metas...>;
  
  // If a template-parameter of a primary class template or alias template is a
  // template parameter pack, it shall be the last template-parameter.
  template<typename ...Types, // expected-error{{template parameter pack must be the last template parameter}}
           int After, int After2>
  struct X0t;
  X0t<int> pr9789();
  template<typename ...Types, // expected-error{{template parameter pack must be the last template parameter}}
           int After>
  using A0t = int;
  
  template<int ...Values, // expected-error{{template parameter pack must be the last template parameter}}
           int After>
  struct X0nt;
  template<int ...Values, // expected-error{{template parameter pack must be the last template parameter}}
           int After>
  using A0nt = int;
  
  template<template<typename> class ...Templates, // expected-error{{template parameter pack must be the last template parameter}}
           int After>
  struct X0tt;
  template<template<typename> class ...Templates, // expected-error{{template parameter pack must be the last template parameter}}
           int After>
  using A0tt = int;
  
  // [ Note: These are not requirements for function templates or class
  // template partial specializations because template arguments can be
  // deduced (14.8.2). -- end note]
  template<typename... Types> struct X1t;
  template<typename ...Types, typename T> struct X1t<T, Types...> { };
  
  template<int... Values> struct X1nt;
  template<int ...Values, int V> struct X1nt<V, Values...> { };
  
  template<template<int> class... Meta> struct X1tt;
  template<template<int> class... Meta, template<int> class M> 
    struct X1tt<M, Meta...> { };
  
  template<typename ...Types, typename T>
  void f1t(X1t<T, Types...>);
  
  template<int ...Values, int V>
  void f1nt(X1nt<V, Values...>);
  
  template<template<int> class... Meta, template<int> class M> 
  void f1tt(X1tt<M, Meta...>);
  
  namespace DefaultTemplateArgsInFunction {
    template<typename T = int, typename U>  T &f0(U) { T *x = 0; return *x; }
  
    void test_f0() {
      int &ir0 = f0(3.14159);
      int &ir1 = f0<int>(3.14159);
      float &fr0 = f0<float>(3.14159);
    }
  
    template<> int &f0(int*);
    template int &f0(double&);
  }
  