unique_ptr<T> 用于数组专用化的 lambda 自定义删除器

我最近开始将许多现有的C++应用程序代码移植到C++11，现在我正在转换为新的智能指针std：：unique_ptr和std：：shared_ptr，我有一个关于自定义删除器的具体问题。我想添加一个 lambda 记录器以查看我的删除被调用的位置，但我无法编译数组专用版本。 建议将不胜感激。

我一直在寻找一个用于 VC++10 或 GCC 4.5.2+ 的数组专用化unique_ptr自定义删除器的示例，但徒劳无功。 我想在 lambda 中调用删除器时打印一条日志消息 - 主要是为了确保我认为超出范围的所有指针都在这样做。 这对于专用化的阵列版本是否可行？ 我可以让它与非数组版本一起使用，如果我传递外部结构"MyArrayDeleter"作为第二个参数，我也可以让它与数组专用化一起工作。 还有一件事，是否有可能删除丑陋的 std：：function，因为我认为我可以让 lambda 签名解决这个问题。

struct MySimpleDeleter {
    void operator()(int* ptr) const {
        printf("Deleting int pointer!n");
        delete ptr;
    }
};
struct MyArrayDeleter {
    void operator()(int* ptr) const {
        printf("Deleting Array[]!n");
        delete [] ptr;
    }
};
{
    // example 1 - calls MySimpleDeleter where delete simple pointer is called
    std::unique_ptr<int, MySimpleDeleter> ptr1(new int(5));
    // example 2 - correctly calls MyArrayDeleter where delete[] is called
    std::unique_ptr<int[], MyArrayDeleter> ptr2(new int[5]);
    // example 3 - this works (but default_delete<int[]> would have been passed
    // even if I did not specialize it as it is the default second arg
    // I only show it here to highlight the problem I am trying to solve
    std::unique_ptr<int[], std::default_delete<int[]>> ptr2(new int[100]);
    // example 3 - this lambda is called correctly - I want to do this for arrays
    std::unique_ptr<int, std::function<void (int *)>> ptr3(
        new int(3), [&](int *ptr){ 
            delete ptr; std::cout << "delete int* called" << std::endl; 
        });
    // example 4 - I cannot get the following like to compile
    // PLEASE HELP HERE - I cannot get this to compile
    std::unique_ptr<int[], std::function<void (int *)>> ptr4(
        new int[4], [&](int *ptr){  
            delete []ptr; std::cout << "delete [] called" << std::endl; 
        });
}
The compiler error is as follows:
The error from the compiler (which complains about the new int[4] for ptr4 below is:
'std::unique_ptr<_Ty,_Dx>::unique_ptr' : cannot access private member declared in class 'std::unique_ptr<_Ty,_Dx>'
1>          with
1>          [
1>              _Ty=int [],
1>              _Dx=std::tr1::function<void (int *)>
1>          ]
1>          c:program files (x86)microsoft visual studio 10.0vcincludememory(2513) : see declaration of 'std::unique_ptr<_Ty,_Dx>::unique_ptr'
1>          with
1>          [
1>              _Ty=int [],
1>              _Dx=std::tr1::function<void (int *)>
1>          ]