[webkit-dev] Should we ever change style guidelines?

Joe Mason jmason at rim.com
Thu Dec 10 08:57:05 PST 2009

Let's try this again now that I've resubscribed with the correct email

> On Wednesday 09 December 2009 07:52:22 pm Peter Kasting wrote:
> > You haven't really said why.  The closest you got was the vague "It
> is also
> > true that the current style guidelines if
> > practiced pedantically in every case can lead to potential bugs."
> Bugs
> > like what?  Perhaps if there are some, we should change the
> appropriate
> > guide, instead of leaving the choice up to a reviewer, who, if the
> rule
> > really _can_ be problematic, might erroneously enforce it.
> Off the top of my head as a reviewer I'd accept:
> 	if (color.red() == 255 && color.green() == 0 && color.blue() ==
> 255) // pink!
> over
> 	if (color.red() == 255 && !color.green() && color.blue() == 255)
> // pink!
> most days of the week...  Consistency and all that.

I was trying to come up with an example for exactly that situation last

The actual potential bug in this comes when "if (!color.green())" comes
on its own - it looks to a casual glance like green() returns a bool
saying whether this color is green or not. Obviously nobody would make
that mistake, but in a more obscure API (possibly to a 3rd-party
component, so we can't sanitize it) the distinction could trip people

This is a corner case and one that's unlikely to come up, which is why
it's not worth putting into the coding standard, but it's exactly the
sort of thing where a submitter should be able to say, "I've broken the
style guide deliberately here because I think this expression is much
clearer with an explicit test against 0".


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