unicode_literal.rb

module U
  def self.+(obj)
    codepoint = obj.is_a?(Numeric) ? obj.truncate : obj.to_s.hex
    to_utf8 codepoint
  end
  
  # Returns a UTF-8 encoded string of the Integer interpreted as a Unicode
  # code point.
  def self.to_utf8(integer)
    # See: http://ruby-doc.org/core-2.2.2/Array.html#pack-method
    [integer].pack("U")
  end
end