Visit a file with a file name extension of .h and the following
contents:
@interface foo {
}
- (void)method;
@end
The buffer will be in c-mode, not objc-mode. CC-Mode should
automatically detect that this is an Objective-C header and switch to
objc-mode. Probably searching for @interface or @implementation should
cover most cases.
It seems like CC-Mode is already doing something similar with `c-or-c++-mode'. Probably that functionality should be extended to cover Objective-C (and Objective-C++?) as well.