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