Passing structs to functions

[phant0m via Digitalmars-d-learn]

On Saturday, 2 July 2016 at 19:46:53 UTC, Adam D. Ruppe wrote:
> On Saturday, 2 July 2016 at 18:37:06 UTC, phant0m wrote:
>> How should I pass a struct variable in D effectively?
>
> Passing by value is often the most efficient. It depends on 
> what exactly you have in the struct.

 From the point of view of a hardcore C++ programmer, D looks very 
promising and very strange at the same time. I understand that my 
C++ habits are not applicable here, so I'm trying to find a 
"correct" way to do basic things.
I took a simple task (for D learning purposes): to implement a 
Point template "class" (something like Qt's QPoint).
As far as I want to be able to add two points, I've implemented 
opAdd() function:

struct Point(T) {
     static assert(__traits(isArithmetic, T));

     T x;
     T y;

     Point opAdd(const ref Point other) const {
         return Point(x + other.x, y + other.y);
     }
}


Now, to be able to use rvalues, I need to add another one:
     Point opAdd(const Point other) const {
         return opAdd(other);
     }

That's where my question came from. Of course, I can use just one 
function, which  accepts arguments by value. I'm just unsure 
whether it's a good decision and a common practice.