[fpc-devel] Object upgrades (new)

[Benito van der Zander]

Hi',

>
> I don't see a need to add management operators to objects. Objects 
> have constructors and destructors, so they don't need Initialize and 
> Finalize operators


One need would be to automatically call the destructor

It could make the code much simpler, especially when it also replaces 
try..finally, and prevent memory leaks


> Just leave the poor, old objects alone.

Objects are much more useful than classes or records

Bye,
Benito

Am 15.06.19 um 18:50 schrieb Sven Barth via fpc-devel:
> Am 15.06.2019 um 17:17 schrieb Ryan Joseph:
>> { I think the old thread “Object upgrades” got broken during the 
>> server move so I’ll try to start a new thread and see if this gets 
>> posted }
>>
>> Another question. I’m not sure it’s possible but I did try to add 
>> management operators to objects and found that if a initialize 
>> operator was declared in a unit which was precompiled and then 
>> inherited from an object in another unit which declared another 
>> initialize operators, the initialize operator would be called twice.
>>
>> The issue is that the operator is compiled into some other code which 
>> always gets called when the object is used as a var type. Is there 
>> any work around to that? The options I’m aware of are:
>>
>> 1) don’t allow management operators in objects (that would be very 
>> unfortunate indeed).
>> 2) don’t allow subclasses to redeclare a management operator (that 
>> seems ok since the operator can call a virtual method from the base 
>> class).
>> 3) allow overriding of operators. I don’t think that would be make 
>> sense or perhaps even possible.
> I don't see a need to add management operators to objects. Objects 
> have constructors and destructors, so they don't need Initialize and 
> Finalize operators and they have a defined assignment operation. Just 
> leave the poor, old objects alone.
>
> Regards,
> Sven
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