NSException raise:format: as the last statement in a method

Question

I have this method:

+ (MHTwitterParser*)createParser:(NSString*)format {
    if ([format compare:@\"json\"] == NSOrderedSame) {
        return [[MHJsonTwitt         


        

Answer 1

The reason is simple.

For the compiler, the method [NSException raise: ...] is a black box method. It doesn't know that the method will actually raise an exception.

If you compare it with Java or C++, their throw statements are a language feature and the compiler knows exactly what will happen when it finds it. In Obj-C it's different and sometimes it depends on runtime conditions. Consider the following.

NSException* exception = nil;

if (someCondition) {

   exception = [NSException exceptionWithName:...];
}

[exception raise];

The compiler won't know if the exception is really raised or not.