C++ map<tuple<...>, V> compilation problems by Bob 234567

Good that is has been fixed. I installed SP1 for Visual Studio today and I am quite disappointed that it was not fixed therein.

This bug was reported 2/18/2010 for the release candidate. I had hope that the fix would at least make it to SP1.

Hi,

Thanks again for reporting this bug. We've fixed it, and the fix will be available in VC11. (It involved a messy interaction between map, pair, and tuple.)

I apologize for the mangled history of this bug; we switched internal databases, and I ported this bug by hand to the new database so I could keep track of it. Unfortunately, someone went through the old database and resolved active bugs as Won't Fix. I don't know how to change the apparent status of this bug on Connect, but we've definitely fixed this.

As always, if you have any further questions, feel free to E-mail me at stl@microsoft.com .

Stephan T. Lavavej
Visual C++ Libraries Developer

I think it is absurd that this bug won't be fixed.

Hello,

Thanks for reporting this issue. At this stage we are unable to address this particular issue as there are other higher priority items for the team.

We appreciate your continued feedback and are constantly trying to incorporate it to make our product better.

Thank you
Visual C++ Team

This bug is rather annoying. Isn't there a temporary fix for the <tuple> header?

Will there be a service pack for VC++10 fixing this?

Hi,

Thanks for reporting this bug. Unfortunately, while I'd love to fix this in VC10 RTM, it's too late - for stability, only major bugs without workarounds can be fixed between RC and RTM. Fortunately, a workaround exists for this bug.

As you noticed, passing temporary tuples to map's op[]() doesn't trigger this bug. Therefore, when you have a named tuple, you can construct a temporary from it and pass that to op[](). Here's an example:

C:\Temp>type meow.cpp
#include <iostream>
#include <map>
#include <ostream>
#include <tuple>
using namespace std;

int main() {
    typedef tuple<short, int, long> key_t;

    map<key_t, char> m;

    key_t t(40, 50, 60);

    m[key_t(t)] = 'X';
    m[key_t(10, 20, 30)] = 'Y';
    m[make_tuple(33, 22, 11)] = 'Z';

    for (auto i = m.cbegin(); i != m.cend(); ++i) {
        cout << "(" << get<0>(i->first)
            << ", " << get<1>(i->first)
            << ", " << get<2>(i->first)
            << "): " << i->second << endl;
    }
}

C:\Temp>cl /EHsc /nologo /W4 meow.cpp
meow.cpp

C:\Temp>meow
(10, 20, 30): Y
(33, 22, 11): Z
(40, 50, 60): X

(Note that make_tuple(33, 22, 11) returns tuple<int, int, int>, which is convertible to tuple<short, int, long>.)

I'm keeping this bug active so that it can be fixed in VC11.

If you have any further questions, feel free to E-mail me at stl@microsoft.com .

Stephan T. Lavavej
Visual C++ Libraries Developer

Thanks for your feedback. We were able to reproduce the issue you are seeing. We are routing this issue to the appropriate group within the Visual Studio Product Team for triage and resolution. These specialized experts will follow-up with your issue.

Thank you for your feedback, we are currently reviewing the issue you have submitted. If this issue is urgent, please contact support directly(http://support.microsoft.com)