Open Methods: From C++ to D

[jmh530 via Digitalmars-d-announce]

On Thursday, 31 August 2017 at 16:55:17 UTC, Jean-Louis Leroy 
wrote:
>
> Indeed I misunderstood.
>
> Well, I am very pleased that my stuff interacts well with the 
> rest of the language - I strive for that. However, I found that 
> it is difficult to get people to open their mind to the idea of 
> open methods, initially. Unless they come from Lisp, 
> polymorphism and membership are almost indissociable for them. 
> I often have to jump three hurdles.
>

I can see that it's a uphill battle, but there's a lot to like 
about it as well for those who listen.

Maybe it would be a good idea to allow the @method to take an 
argument, like @method(Animal), then you could mixin
string kick(virtual!Animal);
without having to define kick.

I think the ideal would be if you could just write something like 
below:
@string(Animal)
string kick(virtual!Dog dog) { return "bark"; }
but I don't really know how to get that to work.