From: Ryan Davis <ryand@...>
Date: 2010-12-15T18:06:55+09:00
Subject: Re: How do I define virtual global variable in ruby?


On Dec 15, 2010, at 00:07 , femto Zheng wrote:

> Hello all,
> in ruby c source code, there is
> [...]
>  3370:     rb_*define_virtual*_variable("$&", last_match_getter, 0);
> <http://codesearch.google.com/codesearch/p?hl=en#kOEgDIzD-Ao/trunk/lib/ruby/re.c&q=define_virtual&sa=N&cd=1&ct=rc&l=3370>
> [...]
> 
> so actually this looks like global variable, but when you get/set it,
> it will run thru a function,
> How do I do it in Ruby code? make a global variable running through my
> customized get/set procedure?

Without using a hacky trick like calling rb_define_virtual_variable through FFI or DL, I don't think you can.