用于C++ 11中RAW指针的SMART向量？

Question

我正在使用一个旧的开源库,其中包含以下(简化)API:

// some class that holds a raw pointer to memory on the heap
// DOES NOT delete it in its destructor
// DOES NOT do a "deep" copy when copied/assigned (i.e., after copying both objects
// will point to the same address)
class Point;

// function used to construct a point and allocate its data on the heap
Point AllocPoint();
// function used to release the memory of the point's data
void DeallocPoint(Point& p);

// Receives a pointer/c-array of Points, along with the number of points
// Doesn't own the memory
void Foo(Point* points, int npts);

在C++ 11中使用此API的最佳方式(最安全/最可读/最优雅)是什么.我不能简单地使用vector<unique_ptr<Point, PointDeleter>>(PointDeleter我可以实现一个简单的自定义删除器),因为那时我将无法使用该函数Foo(期望Point*与否unique_ptr<Point>*).

谢谢

Answer 1

“你”可以编写一个简单的包装器来释放内存：

struct PointVectorWrapper {
  vector<Point> points;
  ~PointVectorWrapper() {
    for (Point& p : points) {
      DeallocPoint(p);
    }
  }
  PointVectorWrapper& operator=(const PointVectorWrapper&) = delete;
  PointVectorWrapper(const PointVectorWrapper&) = delete;
};
// Now the usage is simple and safe:
PointVectorWrapper points;
// ... populate points ...
Foo(points.data(), points.size())

但这似乎有点“临时”。什么是更标准/可重用的解决方案？