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.li...@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 <den...@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 >> >> >> ______________________________**_________________ >>> fpc-pascal maillist - >>> fpc-pascal@lists.freepascal.**org<fpc-pascal@lists.freepascal.org> >>> http://lists.freepascal.org/**mailman/listinfo/fpc-pascal<http://lists.freepascal.org/mailman/listinfo/fpc-pascal> >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2013.0.3408 / Virus Database: 3222/6731 - Release Date: 10/07/13 >>> >>> >>> ______________________________**_________________ >> fpc-pascal maillist - >> fpc-pascal@lists.freepascal.**org<fpc-pascal@lists.freepascal.org> >> http://lists.freepascal.org/**mailman/listinfo/fpc-pascal<http://lists.freepascal.org/mailman/listinfo/fpc-pascal> >> > >
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