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0d23dc6346
Destructors are always called if declared, so allowing deinit to be declared as
unavailable (or potentially unavailable) creates a type checking loophole that
allows unavailable code to execute at runtime:
```
class C {
@available(*, unavailable)
deinit {
print("Oops")
}
}
_ = C() // prints "Oops"
```
Resolves rdar://106409012 and https://github.com/apple/swift/issues/63854.
53 lines
1.3 KiB
Swift
53 lines
1.3 KiB
Swift
// RUN: %target-typecheck-verify-swift -target %target-cpu-apple-macosx10.50
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// REQUIRES: OS=macosx
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@available(*, unavailable)
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class Unavailable {
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deinit {}
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}
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@available(*, unavailable)
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class UnavailableWithUnavailableDeinit {
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@available(*, unavailable)
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deinit {}
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}
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@available(*, unavailable)
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enum UnavailableEnum {
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class NestedWithUnavailableDeinit {
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@available(*, unavailable)
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deinit {}
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}
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}
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class DeinitUnavailable {
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@available(*, unavailable) // expected-error {{deinitializer cannot be marked unavailable with '@available'}}
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deinit {}
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}
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class DeinitUnavailableMacOS {
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@available(macOS, unavailable) // expected-error {{deinitializer cannot be marked unavailable with '@available'}}
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deinit {}
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}
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class AvailableAtDeploymentTargetDeinit {
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@available(macOS 10.50, *)
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deinit {}
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}
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class PotentiallyUnavailableDeinit {
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@available(macOS 10.51, *) // expected-error {{deinitializer cannot be marked potentially unavailable with '@available'}}
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deinit {}
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}
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@available(macOS 10.51, *)
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func funcAvailable10_51() {}
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class AlwaysAvailable { // expected-note {{add @available attribute to enclosing class}}
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deinit {
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funcAvailable10_51() // expected-error {{'funcAvailable10_51()' is only available in macOS 10.51 or newer}}
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// expected-note@-1 {{add 'if #available' version check}}
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}
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}
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