protected function compileConditional(Node $node)
    {

        $type = $node->conditionType;
        $subject = $node->subject;

        if ($subject === 'block')
            $subject = '$__block';

        if ($this->isVariable($subject))
            $subject = "isset($subject) ? $subject : false";

        if ($type === 'unless') {

            $type = 'if';
            $subject = "!($subject)";
        }

        $isPrevConditional = $node->prev() && $node->prev()->type === 'conditional' && $type !== 'if';
        $isNextConditional = $node->next()
            && $node->next()->type === 'conditional'
            && $node->next()->conditionType !== 'if'
            && $node->next()->conditionType !== 'unless';
        $prefix = $isPrevConditional ? '' : '<?php ';
        $suffix = $isNextConditional ? '' : '?>';
        $phtml = $type === 'else'
            ? $this->createCode(' else {', $prefix)
            : $this->createCode("$type ($subject) {", $prefix);
        $phtml .= $this->compileChildren($node->children);
        $phtml .= $this->newLine().$this->indent().$this->createCode("}", '<?php ', $suffix);

        return $phtml;
    }