如何让我的数组 class 实例使用初始化列表来初始化数组

Question

I am trying to write an array class similar to the one in standard lib for practice. I want to be able to initialize my array class by using an initializer list, but I don't what code to add to my class to do that. I am confused because there are multiple elements in the initializer list but only container to hold the data.

#include <iostream>

template<typename T, int size>
class Array
{
private:
    T data[size];

public:
    Array() {};
};

int main()
{
    //I want to do this but it currently doesn't allow me to do this.
    //I need someone to tell me what i need to add to my class to be able
    //to do this
    //Aarray<int, 5> a{1, 2, 3, 4, 5}; 

    //The above line should do
    //a.data[0] = 1;
    //a.data[1] = 2;
    //a.data[2] = 3;
    //a.data[3] = 4;
    //a.data[4] = 5;
}

Answer 1

There are several ways

• make your class aggregate:

   template<typename T, int size> class Array { public: T data[size]; };

• Provide constructor which accept {..} such as

template<typename T, int size>
class Array
{
private:
    T data[size];

public:
    Array(const T (&data)[size]);
    //Array(std::initializer_list<T> ini);

    // ...
};