module RDoc::RubyToken

def self.def_token(token_n, super_token = Token, reading = nil, *opts)
  token_n = token_n.id2name if token_n.kind_of?(Symbol)
  if const_defined?(token_n)
    IRB.fail AlreadyDefinedToken, token_n
  end
  token_c = eval("class #{token_n} < #{super_token}; end; #{token_n}")
  if reading
    TkToken2Reading[token_c] = reading
    return if TkReading2Token[reading]
    if opts.empty?
      TkReading2Token[reading] = [token_c]
    else
      TkReading2Token[reading] = [token_c].concat(opts)
    end
  end
  TkSymbol2Token[token_n.intern] = token_c
end