46 lines
1.3 KiB
Objective-C

//
// ASWeakSet.h
// AsyncDisplayKit
//
// Created by Adlai Holler on 1/7/16.
//
// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@interface ASWeakSet<__covariant ObjectType> : NSObject<NSFastEnumeration>
/// Returns YES if the receiver is empty, NO otherwise.
@property (nonatomic, readonly, getter=isEmpty) BOOL empty;
/// Returns YES if `object` is in the receiver, NO otherwise.
- (BOOL)containsObject:(ObjectType)object;
/// Insets `object` into the set.
- (void)addObject:(ObjectType)object;
/// Removes object from the set.
- (void)removeObject:(ObjectType)object;
/// Removes all objects from the set.
- (void)removeAllObjects;
/// Returns a standard *retained* NSArray of all objects. Not free to generate, but useful for iterating over contents.
- (NSArray *)allObjects;
/**
* How many objects are contained in this set.
* NOTE: This computed property is O(N). Consider using the `empty` property.
*/
@property (nonatomic, readonly) NSUInteger count;
@end
NS_ASSUME_NONNULL_END