How can I find the largest (in size) of two integer types?

Question

For instance:

template 
void fun(const Type1 &v1, const Type2 &v2)
{
    largest::type val          


        

Answer 1

template
struct is_cond {
    typedef T1 type;
};

template
struct is_cond {
    typedef T2 type;
};

template
struct largest {
     typedef typename is_cond< (sizeof(T1)>sizeof(T2)), T1, T2>::type type;
};