On 30.10.2014 04:16, Hans-Peter Diettrich wrote:
Sven Barth schrieb:
On 28.10.2014 10:19, Michael Schnell wrote:
On 10/27/2014 07:59 PM, Sven Barth wrote:
- in code that does not use ARC ("modeswitch arc off" - the default;
or maybe better a local directive) all instance variables are
considered "weak"
While I do have a vision what "weak" means here, can you give an exact
description ?
- no change in reference count when assigning a refcounted object
variable to it
- no change in reference count when assigning it to a refcounted
object variable
I suspect that this can cause premature destruction of the object, when
either
- another value is assigned to the refcounted object variable
- all other (counted) references to the object disappear
But I don't have a solution for these problems, as long as the compiler
inlines the refcounting code at compile time.
Yes, weak reference fall into the category of "from great power comes
great responsibility".
Regards,
Sven
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