Objective-Cでタプル

gistfile1.m

#define tuple(_1, _2) [Tuple tupleWithFirst:_1 second:_2];

@interface Tuple : NSObject

@property (readonly, nonatomic) id _1;
@property (readonly, nonatomic) id _2;

+ (id)tupleWithFirst:(id)_1 second:(id)_2;
- (id)initWithFirst:(id)_1 second:(id)_2;

@end

@implementation Tuple

+ (id)tupleWithFirst:(id)_1 second:(id)_2 {
    return [[self alloc] initWithFirst:_1 second:_2];
}
- (id)initWithFirst:(id)_1 second:(id)_2 {
    self = [super init];
    if (self) {
        __1 = _1;
        __2 = _2;
    }
    return self;
}

@end