# File lib/rack/utils/okjson.rb, line 246
  def strtok(s)
    m = /"([^"\\]|\\["\/\\bfnrt]|\\u[0-9a-fA-F]{4})*"/.match(s)
    if ! m
      raise Error, "invalid string literal at #{abbrev(s)}"
    end
    [:str, m[0], unquote(m[0])]
  end