Copy Constructor DIP and implementation

[Manu]

On Mon, 17 Sep 2018 at 13:55, 12345swordy via Digitalmars-d-announce
<digitalmars-d-announce at puremagic.com> wrote:
>
> On Tuesday, 11 September 2018 at 15:08:33 UTC, RazvanN wrote:
> > Hello everyone,
> >
> > I have finished writing the last details of the copy
> > constructor DIP[1] and also I have published the first
> > implementation [2]. As I wrongfully made a PR for the DIP queue
> > in the early stages of the development of the DIP, I want to
> > announce this way that the DIP is ready for the draft review
> > now. Those who are familiar with the compiler, please take a
> > look at the implementation and help me improve it!
> >
> > Thanks,
> > RazvanN
> >
> > [1] https://github.com/dlang/DIPs/pull/129
> > [2] https://github.com/dlang/dmd/pull/8688
>
> The only thing I object is adding yet another attribute to a
> already big bag of attributes. What's wrong with adding keywords?
>
> -Alexander

I initially felt strongly against @implicit, it shouldn't be
necessary, and we could migrate without it.
But... assuming that @implicit should make an appearance anyway (it
should! being able to mark implicit constructors will fill a massive
usability hole in D!), then it doesn't hurt to use it eagerly here and
avoid a breaking change at this time, since it will be the correct
expression for the future regardless.