/**
* Parses a variable or any other valid member expression that is prefixed
* with PHP's reference operator.
*
* <code>
* // -----------
* foreach ( $array as &$this->foo ) {}
* // -----------
*
* // ----------
* $foo = &$bar->baz;
* // ----------
* </code>
*
* @return PHP_Depend_Code_ASTUnaryExpression
* @since 0.9.18
*/
private function parseVariableOrMemberByReference()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_BITWISE_AND);
$this->consumeComments();
$expr = $this->builder->buildAstUnaryExpression($token->image);
$expr->addChild($this->parseVariableOrConstantOrPrimaryPrefix());
return $this->setNodePositionsAndReturn($expr);
}
