1struct DefinedInBImpl {
2  void f();
3  struct Inner {};
4  friend void FoundByADL(DefinedInBImpl);
5};
6
7@import cxx_templates_common;
8template struct TemplateInstantiationVisibility<char[1]>;
9extern template struct TemplateInstantiationVisibility<char[2]>;
10template<> struct TemplateInstantiationVisibility<char[3]> {};
11extern TemplateInstantiationVisibility<char[4]>::type
12    TemplateInstantiationVisibility_ImplicitInstantiation;
13