That's a good point.
I think both cases (generic and specific) have use.
The generic case allows a kind of convention: All types defined by (string,int)
can create the appropriate *val()* function and get the *new()* function for
free.
The specific case allows for customization: A type can create a custom *new()*
and bind it (or not) to a custom *val()* of their choosing.
