Why debugger is not able to display/watch the struct into the deque?

Question

When I debug the small piece of code below, visual studio debugger doesn't show the value of the struct I pushed into the deque, it just show all fields name = ???. All the other var are correctly watched!

does someone already have the same issue ?

typedef struct ToTestDrift{
    int num;
    uint64_t pts;
    ToTestDrift(int n, uint64_t ts): num(n), pts(ts) {}
    ToTestDrift(const ToTestDrift& ro):num(ro.num), pts(ro.pts) {}
} drift_t;

ifstream input("test.txt"); 
std::deque<drift_t> drift; 
while(!input.eof())
{
    int framenum;  uint64_t pts;
    input >> pts >> framenum;  
    push_back(drift)(framenum, pts);
}

NOTE: I use a boost range adaptor to push_back, but it's the same with drift.push_back !

And if I extract a value like in the following code, in taht case a watchon t is OK...

  BOOST_FOREACH(frame_info_t t, tocheck)
  {
    if(t.pts != 0)
    { 
      fprintf(stdout, "%d \t %0.2f \t %0.e2f \t %d \t %d \n", t.framenum, t.pts, t.drift, t.period, t.type);
    }
  }//*/

Answer 1

I finally found the reason behind that weird issue.

The code I provided is not C++98 compliant and shouldn't compile (in fact it doesn't compile with GCC). The reason is that we can't use a local to a function, struct/class definition, with a template (container or other...), read that post for more info.

And in fact in the visual compiler accept that code, as there is no ID for the struct/class and for their fields, the debugger is "a bit lost"....

I moved the struct/class definition out-side my function, and now the compiler create an ID for the struct/class and the debugger works as usual.

So instead of

int function() 
{
    typedef struct ToTestDrift{
        int num;
        uint64_t pts;
        ToTestDrift(int n, uint64_t ts): num(n), pts(ts) {}
        ToTestDrift(const ToTestDrift& ro):num(ro.num), pts(ro.pts) {}
    } drift_t;

    ifstream input("test.txt"); 
    std::deque<drift_t> drift; 
    while(!input.eof())
    {
        int framenum;  uint64_t pts;
        input >> pts >> framenum;  
        push_back(drift)(framenum, pts);
    }
}

Write

typedef struct ToTestDrift{
            int num;
            uint64_t pts;
            ToTestDrift(int n, uint64_t ts): num(n), pts(ts) {}
            ToTestDrift(const ToTestDrift& ro):num(ro.num), pts(ro.pts) {}
        } drift_t;

    int function() 
    {
        ifstream input("test.txt"); 
        std::deque<drift_t> drift; 
        while(!input.eof())
        {
            int framenum;  uint64_t pts;
            input >> pts >> framenum;  
            push_back(drift)(framenum, pts);
        }
    }

NOTE that the first version of the code is compliant with the new C++11, all new compiler relaxed that limitation, so local function definition of a struct/class should work fine with visual studio 2013.