How do I make Visual Studio display "auto" types

So, when I use auto keyword in VS2015 with something simple, like this:

As you can see, it shows the variable's type, but, when I try something a bit more complex (or defined in another file?), it freaks out and gives me some not-so-useful information:

Although VS is still able to determine top's type:

So, I wonder if there is a way to make this wonderful IDE show those complex/defined somewhere else types?