Forgot to init "content" in "operatorWithStartingToken"?

[Dafenng]

NSString *content = nil;
NSCharacterSet *newLineSet = [NSCharacterSet newlineCharacterSet];
NSCharacterSet *tagSet = [NSCharacterSet characterSetWithCharactersInString:@"<>"];
NSString *separatorString = @"> <";

chars = [[NSMutableDictionary alloc] init];    
NSScanner *rangeScanner = [NSScanner scannerWithString:content]

It makes the warning "NSScanner: nil string argument", and makes this method meanless.

[federicocappelli]

this function have some problems:

• (Operator *)operatorWithStartingToken:(NSString *)token

token is never used and the functions return nil every time.