Re: Which function should get chosen

Thank you. I then have a related problem. I would like the
following to compile. However, the 0 is ambiguated because it
can also be converted to the null pointer:

template <typename Type>
class Base {};

template <typename Type>
class A
{
public:
    A() {}
    explicit A(const Type& that) {}
    explicit A(const Type* that) {}

    template <typename ThatType>
    explicit A(const Base<ThatType>& that) {}
};

int main()
{
    A<float> a(0);
    return 0;
}

I do not want to use a cast to disambiguate in the constructor
call. Ideally, of course, the 0 shouldn't denote a
null-pointer value but there should be a special symbol for
it: but's that's history. How do I get around this?