Leafo\ScssPhp\Parser::variable PHP Метод

    protected function variable(&$out)
    {
        $s = $this->seek();
        if ($this->literal('$', false) && $this->keyword($name)) {
            $out = [Type::T_VARIABLE, $name];
            return true;
        }
        $this->seek($s);
        return false;
    }