Container templates

[monarch_dodra]

On Wednesday, 19 February 2014 at 19:44:12 UTC, Meta wrote:
> On Wednesday, 19 February 2014 at 19:10:44 UTC, Frustrated 
> wrote:
>> Are there container templates that one can mixin to classes 
>> that
>> give them container behavior?
>>
>> e.g.,
>>
>> instead of
>>
>> class A
>> {
>>     Array!int x;
>> }
>>
>> I want
>>
>> class A
>> {
>>    mixin Array!int;
>> }
>>
>> so that I can do something like a.Add(3) instead of a.x.Add(3).
>
> One solution is to use alias this.
>
> class A
> {
>     Array!int x;
>     alias x this;
> }
>
> Then you can do a.Add(3) and the method call will be 
> "rewritten" (I don't know if it's *actually* rewritten) as 
> a.x.Add(3).
>
>>myints nor myfloats need to be actual elements of the class. In
>>fact, in this case it might be ok to override them, e.g.,
>>a.add(1) and a.add(5f) above.
>
> This throws a wrench into the above solution, as you can 
> currently only have 1 alias this. However, your idea of inner 
> classes would work, I think.

I think Proxy would also work here? I'm not sure of the pros/cons 
of each solution though.