Named constructors

[Alex]

On Wednesday, 9 January 2019 at 07:47:02 UTC, Dru wrote:
> Another way to distinguish between constructors is needed.
> Because it is possible to have two different constructors that 
> take the same arguments.
> Adding dummy arguments that are unused hurts code clarity.

Couldn't this problem be solved by a factory method? I mean, 
either this, or something like this: 
http://www.cs.technion.ac.il/users/yechiel/c++-faq/named-ctor-idiom.html

´´´
import std.stdio;
import std.math;

void main()
{
     auto pr = Point.rectangular(2,3);

     assert(approxEqual(pr.x_, 2));
     assert(approxEqual(pr.y_, 3));

     auto pp = Point.polar(1,PI);

     assert(approxEqual(pp.x_, -1));
     assert(approxEqual(pp.y_, 0));
}


struct Point {
public:
   static Point rectangular(real x, real y)      // Rectangular 
coord's
   {
       return Point(x,y);
   }
   static Point polar(real radius, real angle)   // Polar 
coordinates
   {
       return Point(radius * cos(angle), radius * sin(angle));
   }

private:
   this(real x, real y)
   {
       x_ = x;
       y_ = y;
   }
   real x_, y_;
}
´´´