为什么无法初始化“std：：vector”？[复制]

问：

下面是代码片段：

#include <iostream>
#include <vector>

template <typename T>
class Point
{
    public:
        Point() = default;  
        Point(T x, T y):x_(x),y_(y){}
        //Point(const Point&) = delete;
        Point(Point&&) = default;
        T x_;
        T y_;
};

#define INIT_VECTOR

int main ()
{
#ifdef INIT_VECTOR
  std::vector<Point<int>> myvector={{1,1},{2,2}};   //why it does not compile?
#else
  std::vector<Point<int>> myvector;                //whereas, this works well.
  myvector.reserve(5);
#endif

  myvector.emplace_back();
  auto& point = myvector.back();
  point.x_ = 6;
  point.y_ = 9;

  std::cout << "myvector contains:" << std::endl;
  for (auto& pt: myvector)
  {
        std::cout << ' ' << pt.x_ << "," << pt.y_ << std::endl;
  }
  return 0;
}

很明显，它没有复制构造函数，而它有移动构造函数。 我的问题是为什么不编译？ 有人可以澄清一下这件事吗？我想了又想，但还是想不通为什么。Point<T>std::vector<Point<int>> myvector={{1,1},{2,2}};