[C++0x unique_ptr] sorting a vector of unique_ptr fails

[Ian Lance Taylor]

René Bürgel <rbuergel@web.de> writes:

> Is the following code supposed to work in C++0x-Mode or am i just
> doing something wrong?
>
> #include <memory>
> #include <vector>
> #include <algorithm>
>
> int main()
> {
>        std::vector<std::unique_ptr<int> > v;
>        std::sort(v.begin(), v.end());
> }

I think it is supposed to work.  The standard says that the value
must be Swappable, MoveConstructible, and MoveAssignable.  I think
that std::unique_ptr meets those requirements.

I think this is a bug in libstdc++-v3.  Looking at the code, I think
this means that __introsort_loop can't assume that it can pass values
to std::__median.

Ian