gtlt.rb

#! /usr/local/bin/ruby25

class Integer
  alias :' >' :'>'
  alias :' <' :'<'

  def >(other)
    if self.send(:' >', other) then
      other
    else
      nil
    end
  end

  def <(other)
    if self.send(:' <', other) then
      other
    else
      nil
    end
  end
end

class NilClass
  def >(other)
    self
  end

  def <(other)
    self
  end
end

p(if 1<2<3 then 'Y' else 'N' end)
p(if 1<2>3 then 'Y' else 'N' end)
p(if 1>2<3 then 'Y' else 'N' end)
p(if 1>2>3 then 'Y' else 'N' end)

p(if 3<2<1 then 'Y' else 'N' end)
p(if 3<2>1 then 'Y' else 'N' end)
p(if 3>2<1 then 'Y' else 'N' end)
p(if 3>2>1 then 'Y' else 'N' end)