private function parseItem()
    {
        $subparser = new StringValue($this->parser, ($this->level + 1));
        $subparser->parse();

        $key = $subparser->getValue();

        $this->debug('key: ' . var_export($key, true));

        if ($this->tokenIs(T_DOUBLE_ARROW)) {
            // We MUST have an key when double arrow is encountered.
            if ($key === null) {
                $this->bailUnexpectedToken();
            }

            $this->pushStack($key);
            $this->parseValue();
            $this->popStack();
        } elseif ($this->tokenIs(',') || $this->tokenIs(')') || $this->tokenIs(']')) {
            // String item without key.
            $this->debug('String item without key.');
            $this->pushStack($this->counter++);
            $this->parser->setValue($this->parser->getStack(), $key);
            $this->popStack();
        }

        if ($this->tokenIs(',')) {
            $this->getNextToken();
            return true;
        }
        if ($this->tokenIs(')') || $this->tokenIs(']')) {
            $this->debug('closing bracket.');
            $this->getNextToken();

            return false;
        }

        return true;
    }