Open Radar

 
23-Jul-2013 07:57 PM Samuel Defago:
Summary:

The documentation for protocol_getMethodDescription says that the function does not look at parent protocols when performing method lookup:

"Methods in other protocols adopted by this protocol are not included."

When calling the function, though, parent protocols are taken into account. This is confirmed by having a look at the implementation (http://www.opensource.apple.com/source/objc4/objc4-532.2/runtime/objc-runtime-new.mm)

Either the documentation should be fixed, or the implementation itself.

Steps to Reproduce:

Please run the following code:

#import <Foundation/Foundation.h>

#import <objc/runtime.h>

@protocol ParentProtocol <NSObject>

- (void)parentInstanceMethod;

@end

@protocol ChildProtocol <ParentProtocol>

- (void)childInstanceMethod;

@end

int main(int argc, char *argv[])
{
	@autoreleasepool {
		NSCAssert(protocol_getMethodDescription(@protocol(ChildProtocol), @selector(parentInstanceMethod), YES, YES).name == NULL, @"NULL expected");
	}
}

Expected Results:

No assertion failure

Actual Results:

Assertion failure

Regression:

Notes: