Copy Constructor DIP and implementation

[Jonathan M Davis]

On Tuesday, September 25, 2018 6:33:30 AM MDT RazvanN via Digitalmars-d-
announce wrote:
> After discussing with Walter and Andrei we have decided that we
> are going to drop @implicit for now as it may cause bugs (as
> Jonathan has highlighted) and consider constructors that have the
> form this(ref $q1 S rhs) $q2 as copy constructors. I will update
> the DIP with more information.
>
> Also, regarding the cohabitation between postblit and copy
> constructor: in order to make the transition smoother, whenever a
> postblit and a copy constructor are found togheter in a struct,
> the former is used and the latter is ignored (even if it is a
> field postblit). Once the postblit is going to be deprecated we
> can do the opposite and use the copy constructor and ignore the
> postblit.
>
> If @implicit is going to be introduced then that is going to be a
> DIP on its own.

Yay! Thank you.

- Jonathan M Davis