ObjCGenerics

Generics-Macros.h

// Allow to use generics even if not supported yet
#if __has_feature(objc_generics)
  #define NSArrayOf(x) NSArray<x>
  #define NSMutableArrayOf(x) NSMutableArray<x>
  #define NSDictionaryOf(x,y) NSDictionary<x, y>
  #define NSMutableDictionaryOf(x, y) NSMutableDictionary<x, y>
  #define NSSetOf(x) NSSet<x>
  #define NSMutableSetOf(x) NSMutableSet<x>
#else
  #define NSArrayOf(x) NSArray
  #define NSMutableArrayOf(x) NSMutableArray
  #define NSDictionaryOf(x,y) NSDictionary
  #define NSMutableDictionaryOf(x, y) NSMutableDictionary
  #define NSSetOf(x) NSSet
  #define NSMutableSetOf(x) NSMutableSet
  #define __covariant /* allow to use __covariant even if not supported */
#endif

// Allow to use nullability macros and keywords even if not supported yet
#if ! __has_feature(nullability)
  #define NS_ASSUME_NONNULL_BEGIN
  #define NS_ASSUME_NONNULL_END
  #define nullable
  #define _Nullable
  #define __nullable
#endif


/* Example using them all:
NS_ASSUME_NONNULL_BEGIN
- (NSDictionaryOf(NSString*, NSNumber*)* nullable)dictionaryOfStringLengthsForStrings:(NSArrayOf(__covariant NSString* nullable))*strings;
...
NS_ASSUME_NONNULL_END
*/

Feels a bit weird having the * inside the macro, after I used it a bit.

Yeah that's a matter of preference but I hear you

FWIW, with the * as part of the macro, you couldn't do NSArray<id<UITableViewDelegate>> or whatever.

@orta @robb good point, fixed by removing the * yesterday ;)