//  Enums.h
namespace CARS
{
    enum CARS
    {
        ROLLSROYCE
    };
}
namespace BEAUTIFULCARS
{
    enum BEAUTIFULCARS
    {
        ROLLSROYCE = 45
    };
}

#import "Enums.h"

-(void)printEnumvals
{
    NSLog(@"CARS %d BEAUTIFULCARS %d",
                     CARS::ROLLSROYCE,
            BEAUTIFULCARS::ROLLSROYCE);
}

// CARS.h
@interface BEAUTIFULCARS : NSObject
{
    enum
    {
        BEAUTIFULCARS_ROLLSROYCE = 45
    } BEAUTIFULCARS;
}
@end
@interface CARS : NSObject
{
    enum
    {
        CARS_ROLLSROYCE
    } CARS;
}
@end

// CARS.m
@implementation BEAUTIFULCARS
+(NSInteger)ROLLSROYCE{ return BEAUTIFULCARS_ROLLSROYCE; }
@end
@implementation CARS
+(NSInteger)ROLLSROYCE{ return CARS_ROLLSROYCE; }
@end

#import "CARS.h"

-(void)printEnumvals
{
    NSLog(@"CARS %d BEAUTIFULCARS %d",
                     CARS.ROLLSROYCE,
            BEAUTIFULCARS.ROLLSROYCE);
}