Any way to define a new parameterized (generic) type?

[tolmasky]

I am just trying to do something like this:

interface Something<T>
{
    T function();
}

I can't for the life of me figure out how to do this though, so figured I'd ask before filing a WebIDL syntax change. I see in lib/productions/type.js that the generic types seem to be special-cased and hard-coded, so I figure that I am out of luck for introducing new ones. I only really care about introducing a new "opaque" types. That is to say, I'd be perfectly satisfied with something like:

interface Something<T> { };

If not at the WebIDL level, I'd at least like to be able to add to the list of "known" parameterized types at the API level, something like:

WebIDL.parse(string, { extraParameterizedTypes: "Something" });

And then have that added to the existing static list.