1 namespace RealNS { int UsingDecl; } 2 namespace NS = RealNS; 3 typedef int Typedef; 4 using AliasDecl = int; 5 using RealNS::UsingDecl; 6 struct Struct {}; 7 extern int Variable; 8 namespace AnotherNS {} 9 enum X { Enumerator }; 10 void Overloads(); 11 void Overloads(int); 12