Hi,

At Fri, 28 Sep 2007 22:23:28 +0900,
Paul Brannan wrote in [ruby-talk:271468]:
> >   My problem is that someone could still call 'new' on the class. I'd like to
> > remove that possibility by making 'new' private. Unfortunately I can't for the
> > life of me work out how.
> 
>   VALUE rb_cFoo = rb_define_class("Foo", rb_cObject);
>   rb_undef_alloc_func(rb_cFoo);

It makes impossible to create any instances at all.

  rb_undef_method(rb_singleton_class(rb_cFoo), "new");

-- 
Nobu Nakada