非动态生成对象使用shared_ptr

class NoDeleter

{

public:

  void operator() (const void *) {}

};

/// Helper function to construct shared pointer with NoDeleter with cleaner syntax

template <typename T>

std::shared_ptr<T> noDeletePtr(T& r)

{

  return std::shared_ptr<T>(&r, NoDeleter());

}

用法：

X x;

shared_ptr<X> p = noDeletePtr(x);