objc

Added

• autoreleasepool returns the value returned by its body closure.

Added

• Added an rc module with reference counting utilities: StrongPtr, WeakPtr, and autoreleasepool.

• Added some reference counting ABI foreign functions to the runtime module.

Fixed

• Messaging nil under GNUstep now correctly returns zeroed results for all return types.

Added

• Added a class! macro for getting statically-known classes. The result is non-optional (avoiding a need to unwrap) and cached so each usage will only look up the class once.

• Added caching to the sel! macro so that each usage will only register the selector once.

Fixed

• Fixed the implementation of objc::runtime structs so there can't be unsound references to uninhabited types.

Added

• Implemented Sync and Send for Sel.

Added

• Added support for working with protocols with the Protocol struct. The protocols a class conforms to can be examined with the new Class::adopted_protocols and Class::conforms_to methods.

• Protocols can be declared using the new ProtocolDecl struct.

Added

• Added verification for the types used when sending messages. This can be enabled for all messages with the "verify_message" feature, or you can test before sending specific messages with the Message::verify_message method. Verification errors are reported using the new MessageError struct.

• Added support for the GNUstep runtime! Operating systems besides OSX and iOS will fall back to the GNUstep runtime.

• Root classes can be declared by using the ClassDecl::root constructor.

Changed

• C types are now used from std::os::raw rather than libc. This means Encode may not be implemented for libc types; switch them to the std::os::raw equivalents instead. This avoids an issue that would arise from simultaneously using different versions of the libc crate.

• Dynamic messaging was moved into the Message trait; instead of ().send(obj, sel!(description)), use obj.send_message(sel!(description), ()).

• Rearranged the parameters to ClassDecl::new for consistency; instead of ClassDecl::new(superclass, "MyObject"), use ClassDecl::new("MyObject", superclass).

• Overhauled the MethodImplementation trait. Encodings are now accessed through the MethodImplementation::Args associated type. The imp_for method was replaced with imp and no longer takes a selector or returns an UnequalArgsError, although ClassDecl::add_method still validates the number of arguments.

• Updated the definition of Imp to not use the old dispatch prototypes. To invoke an Imp, it must first be transmuted to the correct type.

• Removed objc_msgSend functions from the runtime module; the availability of these functions varies and they shouldn't be called without trasmuting, so they are now hidden as an implementation detail of messaging.

Fixed

• Corrected alignment of ivars in ClassDecl; declared classes may now have a smaller size.

• With the "exception" or "verify_message" feature enabled, panics from msg_send! will now be triggered from the line and file where the macro is used, rather than from within the implementation of messaging.