2009/10/25 Paul Ishenin <webpi...@mail.ru>: > > I don't argue but how do you think to use HasPrevious, PeakNext, > PeakPrevios, Reset, JumpToBack in the for-in loop? Can you suggest a syntax?
I did not expect for-in loop to support all the methods I require (or use), hence the reason I ask, and why I still would like to extend the list/container classes in the RTL to support those. I googled a bit more and found that java actually supports both Iterator and Enumerator in it's container classes. Clearly there is a use-case for each, and one does not necessarily replace the other. So if the for-in loop uses GetEnumerator, I can still implement the GetIterator without conflicting with your implementation. Looking more at the Java class documentation, it seems Enumerator is a "lite" version of Iterator an only supports a small subset of Iterator features. This same idea could be applied to the RTL, and for users that don't want to use for-in loop syntax. > Delphi enumerator pattern is a structure with one boolean function MoveNext > and one property Current. More info is here: Thanks for the link, I'll go take a look at it shortly... -- Regards, - Graeme - _______________________________________________ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
