clang/test/Parser/using-template.cpp

   1 // RUN: %clang_cc1 %s -verify
   2
   3 namespace N1 {
   4 template <typename... Ts>
   5 struct Foo {
   6   template <typename T>
   7   struct Bar {
   8     static constexpr bool is_present = false;
   9   };
  10 };
  11
  12 template <typename T, typename... Ts>
  13 struct Foo<T, Ts...> : public Foo<Ts...> {
  14   using template Foo<Ts...>::Bar;
  15   // expected-error@-1 {{'template' keyword not permitted after 'using' keyword}}
  16 };
  17 }
  18
  19 namespace N2 {
  20 namespace foo {
  21   using I = int;
  22 }
  23 using template namespace foo;
  24 // expected-error@-1 {{'template' keyword not permitted after 'using' keyword}}
  25 using template template namespace foo;
  26 // expected-error@-1 2{{'template' keyword not permitted after 'using' keyword}}
  27 I i;
  28 }
  29
  30 namespace N3 {
  31 namespace foo {
  32   using I = int;
  33 }
  34 using template foo::I;
  35 // expected-error@-1 {{'template' keyword not permitted after 'using' keyword}}
  36 I i;
  37 }
  38
  39 namespace N4 {
  40 template <typename T>
  41 class A {};
  42
  43 template <typename T>
  44 using B = A<T>;
  45 B<int> b;
  46
  47 using template <typename T> C = A<T>;
  48 // expected-error@-1 {{'template' keyword not permitted after 'using' keyword}}
  49 // expected-error@-2 {{expected unqualified-id}}
  50 C<int> c;
  51 // expected-error@-1 {{no template named 'C'}}
  52 }