Trouble initializing a templated class

[quakkels via Digitalmars-d-learn]

I'm going through Adam Wilson's talk 'C# to D' and I've gotten 
hung up by one of his examples regarding generic programming in 
D. Specifically, I'm trying to implement the code example found 
here: http://youtu.be/6_xdfSVRrKo?t=16m44s.

I created a templateExp.d file that looks like this:

	public class BaseClass {}
	public class OtherClass : BaseClass {}

	class SomeClass(T : BaseClass)
	{
		public T[] values;
		public void add(T input) { values ~= input; }
	}

	void main()
	{
		auto sc = new SomeClass();
		OtherClass oc1 = new OtherClass();
		OtherClass oc2 = new OtherClass();

		sc.add(oc1);
		sc.add(oc2);

		import std.stdio;
		writefln("value count", sc.values.length);
	}

When I run the dmd compiler, I get this error:

	>dmd templateExp.d
	teamplteExp.d(12): Error: class teamplteExp.SomeClass(T : 
BaseClass) is used as a type

How can I initialize this class correctly?