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cabdf84179
The Swift class model does not support overriding declarations where either the overridden declaration or the overriding declaration are in an extension. However, the Objective-C class model does, so marking the declaration as @objc (when possible) will work around the limitation. Customize the "cannot override declaration in extension" diagnostic to suggest adding @objc to the overridden declaration in cases where @objc is permitted. Fixes SR-6512 / rdar://problem/35787914.
40 lines
1.4 KiB
Swift
40 lines
1.4 KiB
Swift
// RUN: %target-typecheck-verify-swift -swift-version 4
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//
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// REQUIRES: objc_interop
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class MixedKeywordsAndAttributes { // expected-note{{in declaration of 'MixedKeywordsAndAttributes'}}
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// expected-error@+1 {{expected declaration}} expected-error@+1 {{consecutive declarations on a line must be separated by ';'}} {{11-11=;}}
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override @objc func f1() {}
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}
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@objc class ObjCClass {}
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struct SwiftStruct { }
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class A {
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@objc subscript (a: ObjCClass) -> ObjCClass { // expected-note{{overridden declaration here has type '(ObjCClass) -> ObjCClass'}}
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get { return ObjCClass() }
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}
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func bar() { } // expected-note{{add '@objc' to make this declaration overridable}}{{3-3=@objc }}
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}
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extension A {
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func foo() { } // expected-note{{add '@objc' to make this declaration overridable}}{{3-3=@objc }}
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func wibble(_: SwiftStruct) { } // expected-note{{overridden declaration is here}}
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}
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class B : A {
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// Objective-C
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@objc subscript (a: ObjCClass) -> AnyObject { // expected-error{{overriding keyed subscript with incompatible type '(ObjCClass) -> AnyObject'}}
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get { return self }
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}
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override func foo() { } // expected-error{{overriding non-@objc declarations from extensions is not supported}}
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override func wibble(_: SwiftStruct) { } // expected-error{{overriding declarations in extensions is not supported}}
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}
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extension B {
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override func bar() { } // expected-error{{overriding non-@objc declarations from extensions is not supported}}
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}
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