# File lib/active_support/json/backends/okjson.rb, line 204
    def tok(s)
      case s[0]
      when ?{  then ['{', s[0,1], s[0,1]]
      when ?}  then ['}', s[0,1], s[0,1]]
      when ?:  then [':', s[0,1], s[0,1]]
      when ?,  then [',', s[0,1], s[0,1]]
      when ?[  then ['[', s[0,1], s[0,1]]
      when ?]  then [']', s[0,1], s[0,1]]
      when ?n  then nulltok(s)
      when ?t  then truetok(s)
      when ?f  then falsetok(s)
      when ?"  then strtok(s)
      when Spc then [:space, s[0,1], s[0,1]]
      when ?\t then [:space, s[0,1], s[0,1]]
      when ?\n then [:space, s[0,1], s[0,1]]
      when ?\r then [:space, s[0,1], s[0,1]]
      else          numtok(s)
      end
    end