Is there any way to do templated operator overloading in D? That is something like the following C++ code:

template< class T >
class Test {
...
template< class U >
Test operator+= ( Test<U> t ) {
...
}
..
};

int main() {

Test<double> u;
Test<float> v;

u += v;

}



In D I would try something like this:

class Test(T) {
...
Test opAddAssign(U)( Test!(U) t) {
...
}
.
}

or

class Test(T) {
...
template(U) opAddAssign {
Test opAddAssign( Test!(U) t ) {
...
}
}
}

But it seems to not work.