compiler directive defensive programming for adding ints to nsmuatablearray FMDB/EGODB
- by johndpope
I would like to throw a warning message when users try to add an int to an nsmutablearray
basically any insert statement that includes values that are not nsstring / nsnumber cause run time crashes. It's exactly the same crash you get when you type %@ instead of %d NSLog(int);
The crash is ok, but I want to throw a friendly 'FATAL' message to user.
so far I have this try catch with isKindOfClass NSObject but ints are slipping through.
#define FATAL_MSG "FATAL: object is not an NSObject subclass. Are you using int? use [NSNumber numberWithInt:1] \n"
#define VAToArray(firstarg) ({\
NSMutableArray* valistArray = [NSMutableArray array];\
id obj = nil;\
va_list arguments;\
va_start(arguments, sql);\
@try { \
while ((obj = va_arg(arguments, id))) {\
if([obj isKindOfClass:[NSObject class]]) [valistArray addObject:obj];\
else printf(FATAL_MSG); \
}\
} \
@catch(NSException *exception){ \
printf(FATAL_MSG); \
} \
va_end(arguments);\
valistArray;\
})
- (void)test:(NSString*)sql,... {
NSLog(@"VAToArray :%@",VAToArray(sql));
}
// then call this
[self test:@"str",@"test",nil];
when I call this
[self test:@"str",2,nil];
throw the error message.
