From: "Bill Atkins" <batkins57 / gmail.com>
>
> On Wed, 5 Jan 2005 03:01:34 +0900, Glenn <centrepins / gmail.com> wrote:
> > While learning RUBY a while ago I used RUBY 1.8.1 and RUDL 0.7.1 to
> > write pacman (just as a learning process) and all was well.
> > 
> > Now I've upgraded to RUBY 1.8.2 and RUDL 0.8 I get the following
> > message as soon as I run the game:
> > 
> > (eval):114: undefined method `print_centered' for class `RUDL::SFont'
> > (NameError)
> >         from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/loadpath_manager.rb:5:in
> > `require'
> >         from D:/PacMan/pacman.rb:10
> > 
> > Any ideas?
>
> Yeah, this happened to me too.  It's related to the new version of
> RubyGems, but I haven't gotten a response about it yet.
> 
> The workaround is to use "require__ 'RUDL'"  instead of "require RUDL"
> - not a solution, but it will get you through until the bug is fixed.

I'm seeing this problem too.

I just built RUDL 0.8 from source; my Ruby is:
ruby 1.8.2 (2004-12-25) [i386-mswin32]  (one-click installer)

I get the same thing as above.  Here, from irb:

  irb(main):001:0> require 'RUDL'
  NameError: undefined method `print_centered' for class `RUDL::SFont'
          from (eval):114
          from C:/dev/ruby-1.8.2-14/lib/ruby/site_ruby/1.8/
               rubygems/loadpath_manager.rb:5:in `require'
          from (irb):1

  irb(main):001:0> require__ 'RUDL'
  => true


Knowing nothing about RubyGems, I'm not sure what to make
of it.  Looking at the RUDL code, the method SFont#print_centered
is defined at run-time by the C code, by evaluating ruby code.
It looks like:

void initSFontClasses()
{
  classSFont=rb_define_class_under(moduleRUDL, "SFont", rb_cObject);
  rb_define_singleton_method(classSFont, "new", sfont_new, 1);
  rb_define_method(classSFont, "print", sfont_print, 3);
  rb_define_method(classSFont, "size", sfont_size, 1);

  add_sfont_print_centered();   // defines RUDL::SFont#print_centered

[...]
}

static void add_sfont_print_centered()
{
  rb_eval_string(
    "module RUDL class SFont      \n"
    " def print_centered(surface, y, text)    \n"
    "  print(surface,[(surface.w-size(text)[0])/2,y],text) \n"
    "       self                                                \n"
    " end        \n"
    "end end        \n"
  );
}


Any Gems gurus out there have any thoughts?  Anything you'd
like me to try?  BTW, 'RUDL' is => RUDL.so, not RUDL.rb, if
that makes a difference.


Thanks,

Regards,

Bill