code: def t_php_OBJECT_OPERATOR(t):
      r'->'
      if re.match(r'[A-Za-z_]', peek(t.lexer)):
          t.lexer.push_state('property')
      return f t_php_OBJECT_OPERATOR(t):
      r'->'
      if re.match(r'[A-Za-z_]', peek(t.lexer)):
          t.lexer.push_state('property')
      return t
docs: r'->