is expression with template parameter list

[Jacob Carlborg via Digitalmars-d-learn]

The following example compiles work as expected:

import std.stdio;
import std.typecons;
void main()
{
    Nullable!(int) a;

    static if(is(typeof(a) == Nullable!(U), U))
        writeln("true");
    else
        writeln("false");
}

But if I use the fully qualified name in the condition, i.e. 
"std.typecons.Nullable!(U)", then I get this compile error:

main.d(8): Error: undefined identifier 'U'

Shouldn't this work? I have tried with the latest beta an a bunch of 
older versions of DMD.

--
/Jacob Carlborg