GC for noobs

[Szymon Gatner]

On Thursday, 27 February 2014 at 14:18:47 UTC, Dicebot wrote:
> On Thursday, 27 February 2014 at 14:14:43 UTC, Namespace wrote:
>> Why not? Overhead? No RAII support?
>
> Simply no reason to use classes, structs have all features I 
> need for cases when polymorphism is not necessary (95%+). Being 
> value type is also convenient as it leaves more control to the 
> programmer and RAII is nice cherry on top.

They actually don't have all the necessary features in D afaiu. 
They do have value semantics but can't represent uniqueness 
because of missing move d-tor.

For example in C++ I can create a function that returns a Texture 
class instance and be sure that it is the only one when receiving 
it (because copying is disabled). Then I can always safely 
release all resources related to this texture in objects d-tor. 
In D I can't use struct for this because I would get double-free 
in d-tor so a class instance has to be used instead.