[fpc-devel] Component FTag and Tag should be int64

Hans-Peter Diettrich DrDiettrich1 at aol.com
Mon Nov 22 17:18:52 CET 2010

michael.vancanneyt at wisa.be schrieb:

>> I was looking at the code for Tag property in classes unit and noticed 
>> I can't safely use Tag to keep runtime pointers (at least on a 64 bit 
>> compile). What is the likelihood of getting tags changed to support 
>> universal access under 64/32 bit compiles?
>> What is the logic behind the shortfall? I suspect just legacy and it 
>> could be easily fixed. _______________________________________________
> The logic is that it is bad programming to use an integer to store a 
> pointer.

That's why handles are used for that purpose, and on a 64 bit system 
handles can have 64 bits as well.


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