Question

I have a method that takes a BOOL parameter and I want to make sure it is not nil in the call.

-(void)setNetworkFilterWithName:(NSString *)nameOfFilter toState:(BOOL)newState 

I can’t use a NSParameterAssert(newState); because it will assert when the BOOL is false.

So I do this:

NSParameterAssert((newState == true) || (newState == false));

Is there a more elegant way of checking for this?

Answer 1

A BOOL is a value type, not a pointer so it can not be NULL. It will only be false which is zero or not false which is non zero. No need to check it.

Edit:
If you would like to check and make sure that the BOOL is YES or NO that could prove useful especially in situations where an NSNumber is accidentally passed, which will always evaluate to true if it is not nil.

NSParameterAssert(!newState || newState == YES);