class Opal::Parser

def new_str(str) 

def new_str(str)
  # cover empty strings
  return s(:str, "") unless str
  # catch s(:str, "", other_str)
  if str.size == 3 and str[1] == "" and str.type == :str
    return str[2]
  # catch s(:str, "content", more_content)
  elsif str.type == :str && str.size > 3
    str.type = :dstr
    str
  # top level evstr should be a dstr
  elsif str.type == :evstr
    s(:dstr, "", str)
  else
    str
  end
end