# File rexml/source.rb, line 82
    def encoding=(enc)
      @encoding = Source::encoding_val(enc)
      @buffer = utf8_enc(@buffer) if @encoding != UTF8
      @to_utf = true
      al = case @encoding
	   when UTF16; utf16:utf16
	   when UNILE; unile:unile
	   when ISO_8859_1; asc:asc
	   else
	     @to_utf = false
	     utf8:utf8
	   end
      instance_eval "alias :encode #{al}"
    end