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Normally we wouldn't need this because we do not allow overloading by parameter optionality. In this case, though, we import two Objective-C methods that end up getting renamed to the same name in Swift, one of which has a nullability annotation and the other of which doesn't. Before IUOs were removed from the type system, we would have failed a subtype test when ranking overloads, but now that subtype test passes because we're comparing two optionals of the same type. So the change here is to compare the optionality of the parameters and reject cases where we are testing whether a plain optional is a subtype of something declared to be an IUO. Fixes rdar://problem/38719575.
12 lines
492 B
Swift
12 lines
492 B
Swift
// RUN: %empty-directory(%t)
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// RUN: %build-clang-importer-objc-overlays
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// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk-nosource -I %t) -import-objc-header %S/Inputs/disambiguate_iuo_param.h %s -emit-ir | %FileCheck %s
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// -module-name objc_ir -I %S/Inputs/custom-modules -emit-ir -g -o - -primary-file %s | %FileCheck %s
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// REQUIRES: objc_interop
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// CHECK: define {{.*}} @main
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// CHECK: load {{.*}}, {{.*}}@"\01L_selector(isEqualToObject:)"
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let c = Obj()
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_ = c.isEqual(to: c)
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