From: "Mauricio Fernández" <mfp@...>
Date: 2005-08-02T01:36:38+09:00
Subject: Re: Redefining Regexp#===

On Tue, Aug 02, 2005 at 12:51:06AM +0900, daz wrote:
> 
> I wrote:
> 
> >
> > Regexp#=== is an alias for =~ , therefore need to alias both, I think:
> >
> 
> 
> Sorry folks.  I fooled myself with a plausible-looking test  :-(
> 
> Pit's question is still open.

batsman@tux-chan:/tmp$ cat wrapre.rb

require 'binding_of_caller'

class Regexp
    alias_method :case_eq, :===

    def ===(other)
        Binding.of_caller do |b|
            case_eq(other)
            eval("lambda{|x| $~ = x}", b).call($~)
            nil != $~
        end
    end
end

                        # 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>

-- 
Mauricio Fernandez