我想在Visual Studio调试环境中使gsl :: span像std :: vector / std :: array一样易于调试。

这是我的意思。

给出此代码

    struct custom_class
    {
        custom_class(std::vector<int> & foo) : ptr(foo.data()),length(foo.size())
        {}

        int* ptr;
        size_t length;
    };



    void vector_example()
    {
        std::vector<int> vector_foo = { 0,1,3,4,5,6,2 };

        std::array<int,8> array_foo = { 0,2 };

        gsl::span<int> span_foo(vector_foo);

        custom_class custom_class_foo(vector_foo);

        std::cout << "How can I make my class as debug friendly as std::array and std::vector?" << "\n";
    }

调试器能够像这样可视化std :: vector / array：

std :: array

-       array_foo   { size=8 }  std::array<int,8>
        [0] 0   int
        [1] 1   int
        [2] 3   int
        [3] 4   int
        [4] 5   int
        [5] 6   int
        [6] 3   int
        [7] 2   int
+       [Raw View]  {_Elems=0x000000654696f368 {0,2} }   std::array<int,8>

std :: vector

-       vector_foo  { size=8 }  std::vector<int,std::allocator<int>>
        [capacity]  8   __int64
+       [allocator] allocator   std::_Compressed_pair<std::allocator<int>,std::_Vector_val<std::_Simple_types<int>>,1>
        [0] 0   int
        [1] 1   int
        [2] 3   int
        [3] 4   int
        [4] 5   int
        [5] 6   int
        [6] 3   int
        [7] 2   int
+       [Raw View]  {_Mypair=allocator }    std::vector<int,std::allocator<int>>

但是当我查看std :: span和我自己的自定义类时，我看不到调试器中的第一个索引

自定义类

-       custom_class_foo    {ptr=0x0000015f50e3c340 {0} length=8 }  `anonymous-namespace'::custom_class
-       ptr 0x0000015f50e3c340 {0}  int *
            0   int
        length  8   unsigned __int64

gsl :: span

-       span_foo    {storage_={data_=0x000001f5bb2fdc20 {0} } } gsl::span<int,-1>
-       storage_    {data_=0x000001f5bb2fdc20 {0} } gsl::span<int,-1>::storage_type<gsl::details::extent_type<-1>>
-       gsl::details::extent_type<-1>   {size_=8 }  gsl::details::extent_type<-1>
        size_   8   __int64
-       data_   0x000001f5bb2fdc20 {0}  int *
            0   int