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30 lines
643 B
Swift
30 lines
643 B
Swift
//
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// Copyright © 2017 Open Whisper Systems. All rights reserved.
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//
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/**
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* Container for a weakly referenced object.
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*
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* Only use this for |T| with reference-semantic entities
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* e.g. inheriting from AnyObject or Class-only protocols, but not structs or enums.
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*
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*
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* Based on https://devforums.apple.com/message/981472#981472, but also supports class-only protocols
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*/
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struct Weak<T> {
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private weak var _value: AnyObject?
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var value: T? {
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get {
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return _value as? T
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}
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set {
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_value = newValue as AnyObject
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}
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}
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init(value: T) {
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self.value = value
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}
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}
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