std::vector 中的初始化列表构造函数

Question

I wanted to know how can the initializer list constructors be implemented if I want to make my own vector class?

eg:

Vector_Class<int> v{1, 2, 3, 4, 5};

How can this type of constructor be implemented?

Answer 1

You declare a constructor that takes a std::initializer_list<some_type> .

Example:

#include <iostream>
#include <initializer_list>

template<class T>
class foo {
public:
    foo(std::initializer_list<T> Ts) {
        for(auto v : Ts) {
            std::cout << v << '\n';
        }
    }
};

int main() {
    foo<int> x{1,2,3,4,5};
}

Output:

1
2
3
4
5