[Interest] Proper use of SharedPointer/WeakPointer

[Pritam]

On Thursday 23 February 2012 07:40 PM, Jason H wrote:
> I have an object database (objects inherit QObject) which is 
> queryable. The result of the query is a list of zero or more objects. 
> I don't want to give pointers themselves, as people could call delete 
> on them and destroy the database.
>
> In this example:
> QList<QObject*> results = objDb.query();
>
> I want results to be weak pointers. such that delete results.at(0) 
> will not actually delete an object, just the pointer in the list.
> When creating my object database, do I store real pointers or 
> QSharedPointers?
> In the list am I returning QSharedPointers or QWeakPointers?
>
> Is there a better pointer class that I should be using?
>
> Thanks.
I didn't understand why you need to use QWeakPointer. I think it will be 
better if you use QSharedPointer everywhere. Unless you want to control 
the life time of your objects strictly from within your object database 
and it doesn't matter to you whether some one else is using that object 
or not. That will result in weak pointer checks everywhere else.

-- 
Regards,
Pritam


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