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| func weaklyScoped<T: AnyObject>(_ v: @autoclosure () -> T, action: (T) throws -> ()) rethrows -> T? { | |
| weak var weakValue: T? | |
| do { // optionally autoreleasepool | |
| let value = v() | |
| try action(value) | |
| weakValue = value | |
| } | |
| return weakValue | |
| } |
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