From: daz <dooby@...10.karoo.co.uk>
Date: 2005-08-01T20:21:03+09:00
Subject: Re: Redefining Regexp#===


Pit Capitain <pit@...> wrote

> Hi,
>
> what's wrong with this code:
>
>    class Regexp
>      alias :case_eq :===
>      def ===( other )
>        case_eq( other )
>      end
>    end
>
>    p( /x/ === "abxy" )         # => true
>    p( Regexp.last_match )      # => nil
>    p( /x/.case_eq( "abxy" ) )  # => true
>    p( Regexp.last_match )      # => #<MatchData:0x2a67460>
>
> Why is Regexp.last_match not set when calling the redefined method?
> This is ruby 1.8.2 (2004-12-25) [i386-mswin32] on Windows 2000.


Hi Pit,

Regexp#=== is an alias for =~ , therefore need to alias both, I think:

   class Regexp
     alias :case_eq :=~
     alias :case_eq :===
     def =~( other )
       case_eq( other )
     end
   end

   p( /x/ === "abxy" )         # => true
   p( Regexp.last_match )      # => #<MatchData:0x264a588>
   p( /x/.case_eq( "abxy" ) )  # => true
   p( Regexp.last_match )      # => #<MatchData:0x264a4f8>


You'll know what to do :-)

Regards,

daz