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Re: Warnings with NSError **
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Re: Warnings with NSError **


  • Subject: Re: Warnings with NSError **
  • From: Pontus Ilbring <email@hidden>
  • Date: Fri, 16 Dec 2005 18:03:03 +0100

On 12/16/05, Jonathon Mah <email@hidden> wrote:
> Hi all,
>
> I have a class with a few convenience constructors which take an
> NSError ** as a parameter:
>
>
> + (id)patchWithContentsOfFile:(NSString *)path error:(NSError **)
> outError
> {
> return [[[self alloc] initWithContentsOfURL:[NSURL
> fileURLWithPath:path] error:outError] autorelease];
> }
>
> - (id)initWithContentsOfURL:(NSURL *)patchURL error:(NSError **)outError
> { // Stuff }
>
>
> The 'return' line always generates a warning:
> passing argument 2 of 'initWithContentsOfURL:error:' from distinct
> Objective-C type
>
> I've tried explicitly casting outError to (NSError **) and a couple
> of other things. I'm using GCC 4.0.1 (it also happened on 4.0.0).
>
> What can I do to silence the warning?

+ (id)patchWithContentsOfFile:(NSString *)path error:(NSError **)outError
{
return [[(MyClass *) [self alloc] initWithContentsOfURL:[NSURL
fileURLWithPath:path] error:outError] autorelease];
}

The type of [self alloc] is id, so the compiler can't tell if it is
supposed to use NSAppleScript's initWithContentsOfURL:error: or your
without explicit casting.
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