CODEWITHSUNDEEP
objective-cmacrosvariadic-functions
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Reputation: 23

How call to variadic method from Objective-C macro?

I created a va_list version of variadic method:

+(void)myFunc:(NSString *)message args:(va_list)args;

and created macro TESTLOG that call to above function

#define TESTLOG(x,...) [MyExample myFunc:(x), ##__VA_ARGS__]

the problem is that when i am try calling to TESTLOG macro, I get an error:

TESTLOG("test");
TESTLOG(@"test",@"test1");

Expected expression

How I can solve this issue? I tried to replace args:(va_list)args with ... it is working, but in my case I need to use the va_list and macro.

I think that my issue is with the definition in the macro.

Upvotes: 1

Views: 168

Answers (1)

rmaddy
rmaddy

Reputation: 318814

You can't use the __VA_ARGS__ macro with a va_list argument. Your Objective-C method needs to be defined as:

+ (void)myFunc:(NSString *)message, ... ;

Then your macro can be:

#define TESTLOG(x,...) [MyExample myFunc:(x), __VA_ARGS__]

Upvotes: 1

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