Re: Initializing NSError **, again Re: CoreData Migration Problems
Re: Initializing NSError **, again Re: CoreData Migration Problems
- Subject: Re: Initializing NSError **, again Re: CoreData Migration Problems
- From: Scott Anguish <email@hidden>
- Date: Wed, 9 Feb 2011 14:04:09 -0500
If you pass &blah, if there is no error, blah == nil
Perhaps by-reference would be a better terminology.
Returns, by-reference, an NSError object if the regex is invalid; otherwise nil. Pass nil if you don't care.
Would that be preferable to folks?
Sent from my iPhone
On Feb 9, 2011, at 1:51 PM, Matt Neuburg <email@hidden> wrote:
>
>> Date: Tue, 8 Feb 2011 17:07:00 -0600
>> From: Fritz Anderson <email@hidden>
>> Subject: Initializing NSError **, again Re: CoreData Migration
>> Problems
>>
>> I'm filing a bug against the documentation because it's flat wrong; or if it's right, it's a workaround for a bug, and the variance from universal practice has to be flagged conspicuously, not just casually mentioned.
>
> Howsabout this one, from NSRegularExpression:
>
>> + (NSRegularExpression *)regularExpressionWithPattern:(NSString *)patternoptions:(NSRegularExpressionOptions)options error:(NSError **)error
>> ...
>
>> error
>> An out value that returns any error encountered during initialization. Returns nil if the regular expression pattern is invalid.
>
> Really? :) m.
>
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