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#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
/**
* FSTImmutableSortedSet is a set. It is immutable, but has methods to create new sets that are
* mutations of it, in an efficient way.
*/
@interface FSTImmutableSortedSet <KeyType> : NSObject
+ (FSTImmutableSortedSet<KeyType> *)setWithComparator:(NSComparator)comparator;
+ (FSTImmutableSortedSet<KeyType> *)setWithKeysFromDictionary:(NSDictionary<KeyType, id> *)array
comparator:(NSComparator)comparator;
- (BOOL)containsObject:(KeyType)object;
- (FSTImmutableSortedSet<KeyType> *)setByAddingObject:(KeyType)object;
- (FSTImmutableSortedSet<KeyType> *)setByRemovingObject:(KeyType)object;
- (KeyType)firstObject;
- (KeyType)lastObject;
- (NSUInteger)count;
- (BOOL)isEmpty;
/**
* Returns the index of the object or NSNotFound if the object is not found.
*
* @param object The object to return the index for.
* @return The index of the object, or NSNotFound if not found.
*/
- (NSUInteger)indexOfObject:(KeyType)object;
- (void)enumerateObjectsUsingBlock:(void (^)(KeyType obj, BOOL *stop))block;
- (void)enumerateObjectsFrom:(KeyType)start
to:(_Nullable KeyType)end
usingBlock:(void (^)(KeyType obj, BOOL *stop))block;
- (void)enumerateObjectsReverse:(BOOL)reverse usingBlock:(void (^)(KeyType obj, BOOL *stop))block;
- (NSEnumerator<KeyType> *)objectEnumerator;
- (NSEnumerator<KeyType> *)objectEnumeratorFrom:(KeyType)startKey;
@end
NS_ASSUME_NONNULL_END
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