Hi, Alright, to close this thread: It seems the majority agrees that using semicolons after JS statement inside a Javascript {} block is a good idea. The suggestion is to follow this in new code. Personally, I will point out missing ; as defects in reviews.
Regards Kai > -----Original Message----- > From: Development [mailto:development-bounces+kai.koehne=qt.io@qt- > project.org] On Behalf Of Viktor Engelmann > Sent: Tuesday, October 04, 2016 3:51 PM > To: development@qt-project.org > Subject: Re: [Development] Using semicolons in JS (QML) > > Am 30.09.2016 um 17:43 schrieb Shawn Rutledge: > > > Back in Nokia times it was said that we shouldn't use semicolons, > because it would speed up the parsing [...] > > > As someone who has written countless parsers, I *highly* doubt that this is > actually true. Indenting with tabs was also believed to be *much* slower > than indenting with spaces (which makes absolutely no sense), and that > measurement result turned out to be caused by a bug in firebird. I bet this is > also just an urban legend. Someone probably thought "hey - one less > character to read - must be faster to load", but as André pointed out, the > error recovery will most likely cost more than what you save. Unless if the > behavior is baked into the LR(1) state-graph maybe. > > Also I don't think it is good style to write code that doesn't conform to the > actual language, just because *most* parsers correctly *guess* what you > meant *most* of the time (except in those pathological cases...). I think that > you should *always* tell parsers *precisely* what you mean and don't rely > on it's guessing ability. For reference: The Mariner 1 crash (which cost $80 > million) was supposedly caused by an error that could have been caught by > static analysis at compile time, but was just "guessed away" wrongly. > > > Anyhow, I believe that we have spent more time on this debate than will > ever be saved by omitting semicolons. > > > Viktor > > > -- > > > > Viktor Engelmann > Software Engineer > > The Qt Company GmbH > Rudower Chaussee 13 > D-12489 Berlin > viktor.engelm...@qt.io <mailto:viktor.engelm...@qt.io> > +49 151 26784521 > http://qt.io > > Geschäftsführer: Mika Pälsi, Juha Varelius, Mika Harjuaho > Sitz der Gesellschaft: Berlin, Registergericht: Amtsgericht Charlottenburg, > HRB 144331 B > <http://qt.io> > <http://www.facebook.com/Qt> > <http://www.twitter.com/qtproject> > <https://www.linkedin.com/company/the-qt-company/> > <https://plus.google.com/104580575722059274792> > <https://www.youtube.com/QtStudios> > <http://qtworldsummit.com/> > Qt World Summit 2016 | Pier 27, San Francisco, CA Experience Exponential > Potential on October 18-20 > www.qtworldsummit.com <http://www.qtworldsummit.com> _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development