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350aaa4d39
The test verifies a stdlib behavior whose fix is not present in all OSes. rdar://136943907
25 lines
876 B
Swift
25 lines
876 B
Swift
// RUN: %target-run-simple-swift(-Xfrontend -disable-availability-checking) | %FileCheck %s
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// REQUIRES: executable_test
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// REQUIRES: concurrency
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// REQUIRES: concurrency_runtime
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// UNSUPPORTED: back_deployment_runtime
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// UNSUPPORTED: use_os_stdlib
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class C {
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init() {}
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}
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struct Weak<T: AnyObject> {
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weak var rawValue: T? = nil
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}
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typealias Tuple = (instanceIdentifier: C, object: Weak<C>)
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let object = C()
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let tuple: Tuple = (instanceIdentifier: .init(), object: .init(rawValue: object))
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let closureResult = [tuple].map { $0.object.rawValue }.first
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let keypathResult = [tuple].map(\.object.rawValue).first
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print("Closure result: \(String(describing: closureResult))")
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// CHECK: Closure result: Optional(Optional(main.C))
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print("Keypath result: \(String(describing: keypathResult))")
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// CHECK: Keypath result: Optional(Optional(main.C))
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withExtendedLifetime([object]) { }
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