struct DefinedInBImpl {
void f();
struct Inner {};
friend void FoundByADL(DefinedInBImpl);
};
@import cxx_templates_common;
template struct TemplateInstantiationVisibility<char[1]>;
extern template struct TemplateInstantiationVisibility<char[2]>;
template<> struct TemplateInstantiationVisibility<char[3]> {};
extern TemplateInstantiationVisibility<char[4]>::type
TemplateInstantiationVisibility_ImplicitInstantiation;