Copy Constructor DIP

[jmh530]

On Thursday, 12 July 2018 at 15:42:29 UTC, Luís Marques wrote:
> On Thursday, 12 July 2018 at 15:33:03 UTC, Andrei Alexandrescu 
> wrote:
>> Again: not the charter of this DIP, so you should ask 
>> yourself, not us, this question.
>
> Look, I understand it can be frustrating to have a concrete 
> design proposal derailed by a myriad of speculative questions. 
> But if we suspect that design decision of a DIP might interact 
> poorly with other plausible future D features, should we not at 
> least express our concerns and hopes? By the time the other 
> DIPs come out it might be too late to address the concerns.
>
> In any case, I hope my comments were not too out of bounds of 
> the discussion. If so, I'm sorry.

I like the idea of implicit conversions (until I've been 
convinced otherwise at least), but I don't necessarily think this 
DIP will interact poorly with it. They could be implemented with 
a new opImplicitCast. Less elegantly, you could have special 
behavior when @implicit is used with opCast.