クラスメソッドが定義できないぽい。

あと、これなんだろ?

$ ./ix
ix:001>Null.p;
lib::builtin::Null
ix:002>Class::p : method() { "Class class".p; }
ix:003>Class.p;
lib::builtin::UnsupportedError: instance of Null :: 'p' is not defined member
        <null>:p: in C++ function
        <ix>:0: in <instance of lib::builtin::Fun>
ix:004>Null.p;
Class class