The type of all a* declarations below is just "int" without any
reference or const in them, as you can verify by reading this article:

http://cpp-next.com/archive/2011/04/appearing-and-disappearing-consts-in-c/

Alternatively compile and run this simple test app:

~~~
    #include <iostream>

    #define tryAssignAutoType(x) \
    { \
        std::cout << "original: " << x << std::endl; \
        auto a = x; \
        ++a; \
        std::cout << "after: " << x << ", a: " << a << std::endl; \
    }

    int main() {
        int i = 0;
        const int& iConstRef = i;
        tryAssignAutoType(iConstRef)
        int& iRef = i;
        tryAssignAutoType(iRef)
        const int iConst = i;
        tryAssignAutoType(iConst)
        int&& iRefRef = std::move(i);
        tryAssignAutoType(iRefRef)

        return 0;
    }
~~~

The output is:

~~~
original: 0
after: 0, a: 1
original: 0
after: 0, a: 1
original: 0
after: 0, a: 1
original: 0
after: 0, a: 1
~~~