What kind of sorcery is that?

[NX via Digitalmars-d-learn]

import std.stdio;
void main()
{
        Stuff!(Thing!float) s;
        writeln(typeid(s.var));
        writeln(typeid(s.var.varling));
        writeln(typeid(s));
}
class Stuff(T)
{
        T!int var;
}
class Thing(T)
{
        T varling;
}