相关疑难解决方法(0)

我正在尝试使用以下代码初始化标题中的地图,但它一直给我标题中的错误.我正在使用C++ 11,所以这应该是可能的,对吧？

typedef std::map<NPCAnimation::ID, std::map<Direction::ID, sf::Time>> AnimationSpeedMap;
AnimationSpeedMap AnimationSpeeds = {
    {NPCAnimation::WALK, {
            {Direction::LEFT, sf::milliseconds(100)},
            {Direction::RIGHT, sf::milliseconds(100)},
            {Direction::UP, sf::milliseconds(200)},
            {Direction::DOWN, sf::milliseconds(200)}
        }
    },

    {NPCAnimation::IDLE, {
            {Direction::LEFT, sf::milliseconds(600)},
            {Direction::RIGHT, sf::milliseconds(600)},
            {Direction::UP, sf::milliseconds(600)},
            {Direction::DOWN, sf::milliseconds(600)}
        }
    },

    {NPCAnimation::SPECIAL, {
            {Direction::LEFT, sf::milliseconds(500)},
            {Direction::RIGHT, sf::milliseconds(500)},
            {Direction::UP, sf::milliseconds(500)},
            {Direction::DOWN, sf::milliseconds(500)}
        }
    },
};

提前致谢!~grambler1