Flow\Parser::parseParent PHP Method

    protected function parseParent($token)
    {
        if ($this->inMacro) {
            throw new SyntaxError('cannot call parent block inside macros', $token);
        }
        if (empty($this->currentBlock)) {
            throw new SyntaxError('parent must be inside a block', $token);
        }
        $node = $this->parseIfModifier($token, new Node\ParentNode($this->currentBlock[count($this->currentBlock) - 1], $token->getLine()));
        $this->stream->expect(Token::BLOCK_END);
        return $node;
    }