When I should to call destroy?

[Cauterite via Digitalmars-d-learn]

On Friday, 29 July 2016 at 13:18:00 UTC, Suliman wrote:
> But I can't understand if D have GC it should remove objects 
> when their life is finished. When I should to call `destroy`? 
> What would be if I will not call it?

`destroy` is mainly about running destructors deterministically. 
 From the source comments:

> "It's used to destroy an object so that any cleanup which its 
> destructor or finalizer does is done and so that it no longer 
> references any other objects."

For example, your object might allocate a large amount of 
manually-managed memory, and you don't want that allocation 
laying around until the next GC cycle, so you can use `destroy` 
to finalise your object as early as possible to release that 
manually-managed allocation.

If you really want to deallocate the object's own memory, you can 
check out core.memory.GC.query() / core.memory.GC.free().