Re: CriticalAlert
Re: CriticalAlert
- Subject: Re: CriticalAlert
- From: Kurt Revis <email@hidden>
- Date: Thu, 20 Dec 2001 14:02:10 -0800
On Thursday, December 20, 2001, at 01:36 PM, David Remahl wrote:
On the other hand, the following construct is one I use very often in
Cocoa:
while( myStr = [myEnum nextObject] )
{
// do whatever
}
That would generate a warning, would it not? And I would have to
manually
disable that warning.
Out of the box, gcc with Project Builder used to warn about this, if I
remember correctly. Now that I check, it doesn't seem to do it anymore,
which is unfortunate. (If you add -Wall to your compiler flags, you
will get a warning: "suggest parentheses around assignment used as truth
value".)
To avoid the warning, put an extra pair of parens around the
expression. That is:
while ((myStr = [myEnum nextObject]))
This is a pretty well known idiom. (Like all idioms, it doesn't
necessarily make much sense all by itself, though.)
--
Kurt Revis
email@hidden