chained_cmp.rb

module ChainedComparisons
  refine Fixnum do
    %i[< <= > >=].each do |op|
      define_method(op) { |other| super @@n = other }
    end
  end

  [TrueClass, FalseClass].each do |klass|
    refine klass do
      %i[< <= > >=].each do |op|
        define_method(op) { |other| @@n.send op, other }
      end
    end
  end
end

using ChainedComparisons

p 1 < 2 <= 3
p 1 < 3 <= 2
p 3 >= 2 > 1
p 2 > 1 >= 3