vector <template>, c++, class, add to vector [英] vector <template>, c++, class, adding to vector

问题描述

我正在尝试创建一个类，该类将从一组向量中绘制元素(并将这些向量作为类中的容器保存)，但我觉得在管理具有许多函数(如 vectorOneAdd、vectorTwoAdd)的向量时为了向向量添加元素是没有意义的.一定有更好的方法，这就是我在这里问的原因，我听说您可以使用模板来做到这一点，但我不太确定如何.需要帮助.不想有很多无意义的代码.

I am trying to create a class thats going to draw elements from a set of vectors (and also hold these vectors as containers inside the class), but i feel that when managing the vector having lots of functions like vectorOneAdd, vectorTwoAdd used in order to add elements to the vector is pointless. There must be a better way, thats why i am asking here, I heard you can use templates to do it, but i am not quite certain how. Assistance needed. Don't want to have lots of pointless code in.

我在下面的意思的例子:

Example of what I mean below:

class Cookie
{
std::vector<Chocolate> chocolateContainer;
std::vector<Sugar> sugarContainer;

void chocolateVectorAdd(Chocolate element);    // first function adding to one vector
void sugarVectorAdd(Sugar element);   // second function adding to another vector
}

请使用示例代码，谢谢:)

Please use example code, thanks :)

推荐答案

使用像vectorOneAdd、vectorTwoAdd这样的函数来向向量添加元素是没有意义的.一定有更好的办法

having lots of functions like vectorOneAdd, vectorTwoAdd used in order to add elements to the vector is pointless. There must be a better way

有:

class Cookie {
    std::vector<Chocolate> chocolateContainer;
    std::vector<Sugar> sugarContainer;

private:
    template<typename T>
    std::vector<T>& get_vector(const T&); // not implemented but particularized

    // write one of these for each vector:
    template<>
    std::vector<Chocolate>& get_vector(const Chocolate&) { return chocolateVector; }
    template<>
    std::vector<Sugar>& get_vector(const Sugar&) { return sugarVector; }

public:
    template<typename T>
    void add(T element) {
        auto& v = get_vector(element);
        v.push_back(std::move(element));
    }
};

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