unless 1.respond_to?(:positive?) # TODO: Remove this file when we drop support to ruby < 2.3
  class Numeric
    # Returns true if the number is positive.
    #
    #   1.positive?  # => true
    #   0.positive?  # => false
    #   -1.positive? # => false
    def positive?
      self > 0
    end

    # Returns true if the number is negative.
    #
    #   -1.negative? # => true
    #   0.negative?  # => false
    #   1.negative?  # => false
    def negative?
      self < 0
    end
  end

  class Complex
    undef :positive?
    undef :negative?
  end
end
