From: "Mauricio Fernández" <mfp@...>
Date: 2005-08-02T02:02:54+09:00
Subject: Re: Redefining Regexp#===

On Tue, Aug 02, 2005 at 01:36:38AM +0900, Mauricio Fern�ndez wrote:
> On Tue, Aug 02, 2005 at 12:51:06AM +0900, daz wrote:
> batsman@tux-chan:/tmp$ cat wrapre.rb
> 
> require 'binding_of_caller'
[...]
>                         # former results...
> p(/x/ === "abxy")       # => true
> p(Regexp.last_match)    # => nil
> p(/x/.case_eq("abxy"))  # => true
> p(Regexp.last_match)    # => #<MatchData:0x2a67460>
> 
> batsman@tux-chan:/tmp$ ruby wrapre.rb
> true
> #<MatchData:0x401d05b8>
> true
> #<MatchData:0x401d0450>

I forgot to add that you can probably rewrite Regexp.last_match (using
thread-local vars) if you don't really care about $~ itself; the obvious
implementation requires several other redefinitions though
({Kernel,String}#gsub(!?), String#scan, etc.).

-- 
Mauricio Fernandez