Article: Writing Julia style multiple dispatch code in D

[Jean-Louis Leroy via Digitalmars-d-announce]

On Wednesday, 30 August 2017 at 22:30:12 UTC, data pulverizer 
wrote:
> On Wednesday, 30 August 2017 at 22:10:38 UTC, Jean-Louis Leroy 
> wrote:
>> On Wednesday, 30 August 2017 at 21:30:29 UTC, data pulverizer 
>> wrote:
>>> In the light of this I think your package just became more 
>>> interesting to me.
>>
>> I think that your work and mine are complementary :-)
>
> Here is one strange difference between inheriting from an 
> interface and a class:
>
> ```
> interface Animal{}
> class Dog: Animal{}
> class Cat: Animal{}
>
>
> void main()
> {
> 	Animal[] x;
> 	x ~= new Cat();
> 	x ~= new Dog();
> 	x ~= new Cat();
> 	writeln(typeid(x[0])); // Gives Animal
> }
> ```
>
> But if Animal is set to a class the typeid gives Cat, why does 
> this happen? Does this mean that inheriting from an interface 
> is not really polymorphism?

I noticed that too. Still scratching my head.