Faking namespaces with the new objc_runtime_name. Interestingly, this won't stop the compiler from complaining if you declare two classes of the same name but different namespace, but the runtime representation of the two classes would be different if put into two different frameworks. https://twitter.com/bavarious/status/489461621308522496

Namespaces.m

//  Created by Robert Widmann on 7/16/14.
//  Copyright (c) 2014 CodaFi. All rights reserved.
//

#define stringify(x) #x
#define namespaced_interface(space, klass) class NSObject; \
__attribute__((objc_runtime_name(stringify(space.klass)))) \
@interface klass

#define namespaced_protocol(space, proto) class NSObject; \
__attribute__((objc_runtime_name(stringify(space.proto)))) \
@protocol proto

// Produces a runtime class of Asterism_Object instead of "Object"
@namespaced_interface(Asterism, Object) : NSObject
@end

// Produces a runtime protocol of Asterism_Coder instead of "Coder"
@namespaced_protocol(Asterism, Coder) <NSObject>
@end