Copy Constructor DIP

Manu turkeyman at gmail.com
Tue Jul 17 04:04:33 UTC 2018


On Mon., 16 Jul. 2018, 6:00 pm docandrew via Digitalmars-d, <
digitalmars-d at puremagic.com> wrote:

> On Saturday, 14 July 2018 at 10:53:17 UTC, Andrei Alexandrescu
> wrote:
> > On 7/14/18 5:03 AM, Luís Marques wrote:
> >> If there is "no other meaning of @implicit" (other than the
> >> intersection of those two properties) why don't you just call
> >> it something like @copyctor?
> >
> > I'm totally cool with giving the attribute a more obscure name
> > such as @copyctor or anything people want really.
> >
> > (What follows is a personal opinion.
> >
> > I think it's better to choose a more general attribute name
> > with reduced initial applicability. Then application of said
> > attribute can be extended to other functions with ease. In
> > contrast, an obscure attribute name is sure to be followed by
> > more obscure attribute names. And don't get me started about
> > inventing new syntax.
> >
> > Regarding the hand-wringing over generality: we have an
> > exceedingly poor record of paralysis of analysis, whereby we'd
> > worry that every design decision potentially locks us out from
> > all other as-of-yet-unchosen design decisions. If history is
> > any indication, this sudden worry about vaguely-promising green
> > pastures of the future is a sign of malady. We want copy
> > construction. Conflating this with a very general schemata for
> > implicit conversion would not be a wise decision in my opinion.
> > I now deeply regret ever telling Razvan to mention future
> > possible directions. This DIP must do implicit copy
> > constructors and do it well, nothing less and nothing more.)
> >
> >
> > Andrei
>
> I think in this case, a more obscure name like @copyctor is more
> descriptive. I fear that at some point, a more general attribute
> like "@implicit" will turn into the next "static". To me,
> @implicit smells like one of those keywords that will grow to
> carry many different meanings in different contexts and just end
> up overly-broad.
>

But that's the point, and the key advantage of the name ;)
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