Get which derived class an object is if it's stored in an array of its base class

[Nicholas Wilson via Digitalmars-d-learn]

On Saturday, 15 July 2017 at 13:45:40 UTC, Morimur55 wrote:
> On Saturday, 15 July 2017 at 13:12:49 UTC, Adam D. Ruppe wrote:
>> On Saturday, 15 July 2017 at 13:02:52 UTC, Morimur55 wrote:
>>> [...]
>>
>> The `typeid(obj)` will give the type... but why do you need 
>> it? The classinfo returned by that doesn't give a lot of info.
>>
>> Casting is how you actually get the object, though you might 
>> be better off putting the necessary methods in the base class.
>
> Well I want to cast to the derived type so I can use a method 
> that's defined in the base class, but is overridden in several 
> of the derived types... and calling it without a cast seems to 
> give me the base type functionality, but I'd like the derived 
> type functionality when it's defined.

It should work, please post some test code.

We have a syntax If you want to call a method from a different 
class on an object:
A a;
a.B.foo(); // call a.foo as if `a` were a B


> I have a lot of derived types, some of which may be added in 
> future by someone else... was hoping something like 
> `cast(typeid(obj))` was going to work... but my compiler 
> doesn't like that :(