Re: Macro to output an NSString containing function name, line number plus a string with a variable number of arguments?
Re: Macro to output an NSString containing function name, line number plus a string with a variable number of arguments?
- Subject: Re: Macro to output an NSString containing function name, line number plus a string with a variable number of arguments?
- From: Laurent Daudelin <email@hidden>
- Date: Tue, 17 Apr 2012 16:01:46 -0700
You're probably right, Christiaan, as it doesn't work any better.
So, how would a macro like this be written?
-Laurent.
--
Laurent Daudelin
AIM/iChat/Skype:LaurentDaudelin http://www.nemesys-soft.com/
Logiciels Nemesys Software email@hidden
On Apr 17, 2012, at 15:51, Christiaan Hofman wrote:
>
> On Apr 18, 2012, at 0:36, Marco S Hyman wrote:
>
>>>
>>> So far, my latest try is this:
>>>
>>> #define FileLog(format, ...) {\
>>> return [NSString stringWithFormat:@"\n %s [Line %d] \n %@", __PRETTY_FUNCTION__, __LINE__, [NSString stringWithFormat:(format), ##__VA_ARGS__]];\
>>> }
>>>
>>
>> Change that to something that looks like a statement. One that you
>> can add a ; to is even better. The "standard" way to do that is
>>
>> #define FileLog(format, ...) do { \
>> return [NSString stringWithFormat:@"\n %s [Line %d] \n %@", \
>> __PRETTY_FUNCTION__, __LINE__, [NSString stringWithFormat:(format), \
>> ##__VA_ARGS__]]; } while (0)
>>
>> Marc
>
> Apart from that, a "return" in a macro is almost certainly not what you want. A macro is not a function in any way.
>
> Christiaan
>
>
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