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Re: Macro to output an NSString containing function name, line number plus a string with a variable number of arguments?
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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: Marco S Hyman <email@hidden>
  • Date: Tue, 17 Apr 2012 15:36:44 -0700

>
> 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
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  • Follow-Ups:
    • Re: Macro to output an NSString containing function name, line number plus a string with a variable number of arguments?
      • From: Christiaan Hofman <email@hidden>
References: 
 >Macro to output an NSString containing function name, line number plus a string with a variable number of arguments? (From: Laurent Daudelin <email@hidden>)

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