[fpc-devel] class abstract, class sealed implementation. please review.

[Jonas Maebe]

Florian Klaempfl wrote on Sat, 17 Oct 2009:

> Graeme Geldenhuys schrieb:
>> 2009/10/16 Paul Ishenin <webpirat at mail.ru>:
>>> Sealed class is a class which can't be derived by another class.  
>>> This one is
>>> fully supported by delphi.
>>
>> Would you mind explaining this - I never saw the benefit of a sealed
>> class.
>
>> From a compiler developers point of view, it makes optimization easier
> under certain cases (e.g. virtual method calls).

FPC can already do this automatically for all classes in the entire  
program with whole-program optimization. You don't need sealed classes  
for this (they might slightly improve those optimizations, but I doubt  
it will be noticeable in real life -- even doing it for an entire  
program using WPO generally has no noticeable effects on speed, and  
only marginal effects on code size).


Jonas

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