module Erubis::Converter

def convert(input)

# convert input string into target language 
def convert(input)
  codebuf = ""    # or []
  @preamble.nil? ? add_preamble(codebuf) : (@preamble && (codebuf << @preamble))
  convert_input(codebuf, input)
  @postamble.nil? ? add_postamble(codebuf) : (@postamble && (codebuf << @postamble))
  @_proc = nil    # clear cached proc object
  return codebuf  # or codebuf.join()
end