How to make a generic function to take a class or struct by reference?

[Ali Çehreli]

On 3/27/22 22:32, vit wrote:

 > int* getX(T)(return auto ref T t)
 > if(is(T == class) || (is(T == struct) && __traits(isRef, t))){
 >      return &t.x;
 > }

I also think 'return' parameter is needed but I could not come up with 
an example where that 'return' provides any more safety. Compiler 
already warns without it. (I tried with and without -preview=dip1000 
-preview=dip25).

Ali