Constructor inheritance? Why not?
Tofu Ninja via Digitalmars-d
digitalmars-d at puremagic.com
Sun Jun 7 21:16:12 PDT 2015
On Monday, 8 June 2015 at 03:35:52 UTC, Jonathan M Davis wrote:
> On Monday, 8 June 2015 at 02:39:22 UTC, Tofu Ninja wrote:
>> Is there any reason why constructors are not inherited? All
>> other methods are inherited, why not constructors?
>
> They're not polymorphic, and it doesn't make sense to call a
> base class constructor on a derived class. I think that I heard
> somewhere that C++11 added some sort of constructor
> inheritance, so maybe there's something we could do that would
> make sense, but in general, I don't see how the concept makes
> any sense at all. Construction is intimately tied to the type
> being constructed. It's as non-generic as you can get.
>
> - Jonathan M Davis
Their are plenty of examples where you would want a constructor
to be inherited, exceptions being a good one. Currently if you
have a base class with a constructor that you want all the sub
classes to have as well, you simply have to just copy past them
all over the place.
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