From: Eric Hodel <drbrain@...7.net>
Date: 2007-01-21T16:24:52+09:00
Subject: Re: Getting the version number for rubygems?

On Jan 20, 2007, at 21:29, Gregory Brown wrote:
> On 1/21/07, Devin Mullins <twifkak@comcast.net> wrote:
>> Gregory Brown wrote:
>> > instead of alias i'll use alias_method.
>> Why? (Curious, not argumentative.)
>
> alias is really a somewhat scary function.  I can't think of a good
> example right now, but i've seen a couple different surprising things
> with alias, wheras alias_method is simple and has normal behaviour.
> Perhaps someone on the list can help me out with this.

You're seeing phantoms.  There's no difference between alias_method  
and alias on the inside.

       case NODE_ALIAS:
         if (NIL_P(ruby_class)) {
             rb_raise(rb_eTypeError, "no class to make alias");
         }
         rb_alias(ruby_class, rb_to_id(rb_eval(self, node->u1.node)),
                              rb_to_id(rb_eval(self, node->u2.node)));

static VALUE
rb_mod_alias_method(mod, newname, oldname)
     VALUE mod, newname, oldname;
{
     rb_alias(mod, rb_to_id(newname), rb_to_id(oldname));


-- 
Eric Hodel - drbrain@segment7.net - http://blog.segment7.net

I LIT YOUR GEM ON FIRE!