From: Tomasz Wegrzanowski <tomasz.wegrzanowski@...>
Date: 2006-08-08T14:51:37+09:00
Subject: How to make objects that can set $1 when obj =~ /(.)/ is called ?

Something like that would be a reasonable thing to do:

class Foo
  def initialize(t)
    @text = t
  end
  def =~(x)
    @text =~ x
  end
end

And it works for non-capturing regexps,
but when we want to capture something
$1 etc. are bound only within the =~ method,
and when the method returns they are
restored to their previous values.

Foo.new("Hello") =~ /(e)/ # => 1
$1 # => nil

Is it possible to somehow get =~ like that work,
even if it takes heavy metaprogramming hackery ?

-- 
Tomasz Wegrzanowski [ http://t-a-w.blogspot.com/ ]