Copy Constructor DIP and implementation

[12345swordy]

On Monday, 17 September 2018 at 23:07:22 UTC, Manu wrote:
> 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.

If that where the case, then why not make it an actual keyword? A 
frequent complaint regarding D is that there are too many 
attributes, this will undoubtedly adding more to it.

-Alexander