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Xi Ge
ba0743de1f
Unlike @objc on regular classes, we don't have an opportunity to mark these synthesized trapping inits as unavailable via a generated header. Instead, we should diagnose them from the Swift implementation side. rdar://178174203
25 lines
1.0 KiB
Swift
25 lines
1.0 KiB
Swift
// RUN: %target-swift-frontend -emit-silgen -verify -import-objc-header %S/Inputs/objc_implementation_inherited_init.h -enable-experimental-feature ObjCImplementation -target %target-stable-abi-triple -Xcc -Wno-nullability-completeness %s
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// REQUIRES: objc_interop
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// REQUIRES: swift_feature_ObjCImplementation
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// Declaring a designated initializer suppresses inheritance of NSObject's
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// 'init()', which the compiler turns into a trapping stub. Objective-C callers
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// can still invoke it (e.g. '[ImplsMissingInit new]'), so it must be implemented.
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@objc @implementation extension ImplsMissingInit {
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// expected-warning@-1 {{'@objc @implementation' extension does not implement initializer 'init()' inherited from its superclass; invoking it from Objective-C will trap at runtime}}
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init(value: Int32) {
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super.init()
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}
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}
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// Overriding 'init()' satisfies the requirement: no diagnostic.
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@objc @implementation extension ImplsHasInit {
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init(value: Int32) {
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super.init()
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}
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override init() {
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super.init()
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}
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}
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