Move Semantics with unique_ptr

Question

I am using Visual Studio 2012 Update 2 and am having trouble trying to understand why std::vector is trying to use the copy constructor of unique_ptr. I have looked at similar

Answer 1

MyObject o; defines o to be an object. Which means it's a l-value. Doing s.push_back(o); then invokes the l-value overload of push_back() (it has no other choice), which tries to create a copy.

Since your class is noncopyable, you have to move the object into the vector:

for (int i = 0; i < 5; ++i)
{
    MyObject o;
    s.push_back(std::move(o));
}