Move constructor doesn't move

Question

I compiled and run the following code in Visual Studio 2013 and it printed that the content of the moved object didn't change. I know that moved object can only be destroyed or assigned from another object, so my code isn't standard complaint. But anyway ...

#include <iostream>
#include <vector>
#include <string>
#include <utility>


struct Foo
{
    std::string str;
    std::vector<int> vec;
};


int main()
{

    Foo foo = {"abc", {1, 2, 3}};

    Foo foo2( std::move(foo) );

    std::cout << foo.str.size() << '\n' << foo.vec.size() << '\n';

    return 0;
}

The output was:

3
3

Since both string and vector define move operators I expected my class would have synthesized move constructor that would leave moved object empty.

Answer 1

From http://msdn.microsoft.com/en-us/en-en/library/hh567368.aspx

"Rvalue references v3.0" adds new rules to automatically generate move constructors and move assignment operators under certain conditions. However, this is not implemented in Visual C++ in Visual Studio 2013, due to time and resource constraints.