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Note, I'm specifically referring to the fact that dot notation is being used with class methods, not instance methods. Out of curiosity, I wanted to see what would happen if I tried to use Objective-C dot notation syntax with a class method. My experiment was as follows: #import <Foundation/Foundation.h> static int _value = 8; @interface Test : NSObject + (int) value; + (void) setValue:(int)value; @end @implementation Test + (int) value { return _value; } + (void) setValue:(int)value { _value = value; } @end int main(int argc, char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; NSLog(@"Test.value: %d", Test.value); NSLog(@"[Test value]: %d", [Test value]); Test.value = 20; NSLog(@"Test.value: %d", Test.value); NSLog(@"[Test value]: %d", [Test value]); [Test setValue:30]; NSLog(@"Test.value: %d", Test.value); NSLog(@"[Test value]: %d", [Test value]); [pool release]; return 0; } I was surprised to see that this was compiled, let alone executed with what is, I suppose, correct behavior. Is this documented somewhere, or just a fluke of the compiler? I compiled using GCC on Mac OS X 10.6: gcc --version: i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5659) compile using: gcc ObjCClassDotSyntax.m -framework Foundation -o ObjCClassDotSyntax run: ./ObjCClassDotSyntax output: 2010-03-03 17:33:07.342 test[33368:903] Test.value: 8 2010-03-03 17:33:07.346 test[33368:903] [Test value]: 8 2010-03-03 17:33:07.351 test[33368:903] Test.value: 20 2010-03-03 17:33:07.352 test[33368:903] [Test value]: 20 2010-03-03 17:33:07.353 test[33368:903] Test.value: 30 2010-03-03 17:33:07.353 test[33368:903] [Test value]: 30

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