I don't understand why this behaves as it does. Given the
following two templates:
```
void printVal(T)(T t) {
writeln(t);
}
void printVal(T : T*)(T* t) {
writeln(*t);
}
```
I find that I actually have to explicitly instantiate the
template with a pointer type to get the specialization.
```
void main() {
int x = 100;
printVal(x);
int* px = &x;
printVal(px); // prints the address
printVal!(int*)(px) // prints 100
}
```
Intuitively, I would expect the specialization to be deduced
without explicit instantiation. Assuming this isn't a bug (I've
been unable to turn up anything in Bugzilla), could someone in
the know explain the rationale behind this?
