Re: Dynamic Templates

I was wondering, first if this was possible with templates, say i have
a class like this:

template<class T, int N>
class foo : public foo_base
{

};

can instantiate this class like using a runtime integer like this:
int i = calculateSize();
foo_base * var = new foo<int, N>();

and if thats possible, could i instantiate it the class using some
runtime type, perhaps something like this:
class c = getType();
foo_base * var = new foo<c, 0>();

perhaps it could be done, but not in this simple way. I could build a
Type class that hold types in it at runtime, but then how do i
instanstiate it in a template?? does anyone have ideas any suggestions
on this matter?