Re: NSError as parameter to methods

[Riccardo Mottola]

Hi David,

On 01/29/16 13:28, David Chisnall wrote:
> It would help to look at the code in question.  I suspect it’s to do with the 
> fact that, with ARC, pointers to objects are implicitly cleared on creation, 
> because every object pointer must either be nil or a valid object.

I surely can copy&paste a small section of code. However your answer 
says it all: the code is compiled with ARC on Mac, while I am compiling 
it without on GNUstep.
This means that the code works correctly on Mac: the NSError is declared 
just one line before using it.

I leaves unanswered though if a method using NSError is expected to 
leave the previous content untouched or cleared to nil, in case of no error.

Riccardo