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Reputation: 444

Define custom NSAssert that includes line, class and general formatting

As the title reads, how could I define a custom NSAssert which would include the line, class, and formatting as per my NSLog below:

#define NSLog(__FORMAT__, ...) NSLog((@"%@: " __FORMAT__), NSStringFromClass([self class]), ##__VA_ARGS__)

The problem is that NSAssert has a BOOL value first before the rest of the arguments are taken under account. I can't seem to find a solution without taking out the arguments and separating them.

Is there a better way to solve this?

Long story short, I'm looking for something like this:

#define DebugAssert(__VA_ARGS__[0], @"%@: %@", NSStringFromClass([self class]), __VA_ARGS__[1])

Upvotes: 0

Views: 90

Answers (1)

Ken Thomases
Ken Thomases

Reputation: 90521

The NSAssert macro is defined like this:

#define NSAssert(condition, desc, ...)  /* the implementation */

So, the condition is already a separate parameter from the format string and the variable argument list. There should be no problem doing something similar to what you did for NSLog:

#define MyAssert(condition, desc, ...) \
    NSAssert(condition, (@"%@: " desc), NSStringFromClass([self class]), ##__VA_ARGS__)

Upvotes: 1

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