From: Christophe Mckeon <chromatophore@...>
Date: 2007-12-14T23:24:15+09:00
Subject: Re: Is there any way to redefine the `new' method?

another way:

module Scheme
  class Symbol
    @names = {}
    def self.new name
      @names[name.to_sym] ||= super
    end
    def initialize name
      @name = name.to_sym
    end
  end
end

foo1 = Scheme::Symbol.new(:foo)
foo2 = Scheme::Symbol.new(:foo)
bar1 = Scheme::Symbol.new(:bar)
bar2 = Scheme::Symbol.new(:bar)
puts ((foo1 == foo2) && (bar1 == bar2) && (bar1 != foo1))
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