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// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend -emit-module -emit-module-path %t/ImplementationOnlyDefs.swiftmodule -module-name ImplementationOnlyDefs %S/Inputs/ImplementationOnlyDefs.swift \
// RUN: -enable-library-evolution -swift-version 5
// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -I %t -enable-library-evolution -swift-version 5 -emit-sil -o /dev/null -verify %s
// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -I %t -enable-library-evolution -swift-version 5 -emit-sil -o /dev/null -verify -strict-concurrency=targeted %s
// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -I %t -enable-library-evolution -swift-version 5 -emit-sil -o /dev/null -verify -strict-concurrency=complete %s
// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -I %t -enable-library-evolution -swift-version 5 -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation %s
// REQUIRES: concurrency
// REQUIRES: swift_feature_RegionBasedIsolation
@_implementationOnly import ImplementationOnlyDefs
// expected-warning @-1 {{'@_implementationOnly' is deprecated, use 'internal import' instead}}
class D: C {
@_implementationOnly
override func f(_: @escaping () -> Void) { }
@_implementationOnly
override func g(_: @escaping () -> Void) -> BSub { BSub() }
// expected-error@-1{{'@_implementationOnly' override must have the same type as the declaration it overrides ('(@escaping () -> Void) -> BSuper')}}
}
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