delegates.rb

require "delegate"

Foo = Class.new(SimpleDelegator)
Bar = Struct.new(:foo)

Foo.new(1) == Foo.new(1) # => true

Bar.new(1) == Bar.new(1) # => true
Foo.new(Bar.new(1)) == Foo.new(Bar.new(1)) # => false

Baz = Class.new(SimpleDelegator) do
  def ==(other)
    return super(other.__getobj__) if self.class == other.class
    super
  end
end
Baz.new(Bar.new(1)) == Baz.new(Bar.new(1)) # => true