如何使用initializer_list列表初始化具有自定义类的地图

Question

The following code can work:

pair<int, string> p({1, "aaa"});

However, the following code can't work:

struct XXX {
  XXX() {}
  explicit XXX(int l) : v(l) {}
  int v = 1;
};
pair<int, XXX> p2({1, 2});

I understand that if I remove the "explicit", the code can work. However, using explicit has its benefits... How to make the initializer_list work with explicit keyword is used..?

Answer 1

pair<int, XXX> p2({1, XXX(2)});