Description:
------------
Can static keywords like self:: parent:: ... be supported when using sth like {self::$varname} in HEREDOC ?

Reproduce code:
---------------
<?php
class static_test{
  static public $name = 'sskaje';

  static public function test()
  {
    $string = <<<HEREDOC
Hello, {self::$name};
HEREDOC;
    echo $string;
  }
}
static_test::test();

Expected result:
----------------
Hello, sskaje;

Actual result:
--------------
Notice: Undefined variable: name in G:\wwwroot\Test\static_call.php on line 8
Hello, {self::};