pub unsafe trait Message: RefEncode { }Expand description
Types that can be sent Objective-C messages.
Implementing this provides MessageReceiver implementations for common
pointer types and references to the type, which allows using them as the
receiver (first argument) in the msg_send! macro.
Safety
A pointer to the type must be able to be the receiver of an Objective-C
message sent with objc_msgSend or similar.
The object must also respond to the retain, release and autorelease
messages, as that allows it to be used with rc::Id.
Additionally, the type must implement RefEncode and adhere to the
safety requirements therein.