[fpc-pascal] [OT] sealed?

[Dmitry Boyarintsev]

Actually, it's useful when used a platform-specific keyword (i.e. for
declaring an external Java-class, which can be finalized).
It was introduced for platform-specific needs (delphi.net), but became a
part of the language.

thanks,
Dmitry



On Tue, Oct 8, 2013 at 12:14 AM, Dmitry Boyarintsev <
skalogryz.lists at gmail.com> wrote:

> A well written class doesn't need to be sealed. As well as doesn't require
> an inheritance.
>
> IIRC, "sealed" was added to delphi language at the time of the delphi
> .nettism. Correct me, if I'm wrong but Delphi-net is dead (replaced by
> Oxygen, which is not delphi or pascal).
> However, since the keyword was introduced in the some point of the
> language, the support was provided in the next versions of the Delphi
> language/compiler.
> Since FPC announces Delphi-compatibility on syntax level, the keyword was
> introduced in FPC as well.
>
> Usefulness of the "sealed" (as some other .nettish syntax, i.e. class
> helpers) is questionable and further discussion is probably better for
> fpc-other list. So feel free to use it for good or bad.
>
> thanks,
> Dmitry
>
>
> On Mon, Oct 7, 2013 at 11:22 PM, Dennis Poon <dennis at avidsoft.com.hk>wrote:
>
>> > It is wonderful, thank you very much Sven! :)
>>
>>>
>>> Well, the opinion whether this feature is wonderful or not differs among
>>> FPC/Delphi users :P
>>>
>>> Regards,
>>> Sven
>>>
>>>  May I know the usual use of such feature?  I can only think of library
>> vendors want to seal a class to prevent users from modifying it without
>> paying for an upgraded/better version of such class.
>>
>> Dennis
>>
>>
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