interface Twig_LexerInterface

interface Twig_LexerInterface {

  /**
   * Tokenizes a source code.
   *
   * @param string $code     The source code
   * @param string $filename A unique identifier for the source code
   *
   * @return Twig_TokenStream A token stream instance
   */
  public function tokenize($code, $filename = null);

}