In this example, the last line fails to compile. I understand why, but I wonder how I can make the compiler understand that I want to call Class(const int &) to create an unnamed instance, instead of trying to call the undefined default constructor and creating an instance named i:

struct Class {
    Class(const int &) {}
};

void foo() {
    int i;

    // Works
    Class(int(i));

    // Fails
    Class(i);
}