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// RUN: %empty-directory(%t)
// RUN: split-file %s %t
// RUN: %target-swift-frontend -swift-version 5 %t/OtherLibrary.swift -emit-module -module-name OtherLibrary -o %t
// RUN: %target-swift-frontend -typecheck %t/Library.swift -module-name Library -verify -swift-version 5 -import-underlying-module -I %t
// RUN: %target-swift-frontend -typecheck %t/Library.swift -module-name Library -verify -swift-version 5 -DEXPLICIT_IMPORT -I %t
// REQUIRES: objc_interop
//--- module.modulemap
module Library {
header "Library.h"
}
//--- Library.h
@import Foundation;
@interface UnderlyingLibraryClass : NSObject
@end
@protocol UnderlyingLibraryProtocol
@end
//--- OtherLibrary.swift
public class OtherLibraryClass {}
public protocol OtherLibraryProtocol {}
//--- Library.swift
#if EXPLICIT_IMPORT
@_exported import Library
#endif
import OtherLibrary
public class LibraryClass {}
public protocol LibraryProtocol {}
extension LibraryClass: UnderlyingLibraryProtocol {}
extension LibraryClass: LibraryProtocol {}
extension LibraryClass: OtherLibraryProtocol {}
extension UnderlyingLibraryClass: OtherLibraryProtocol {}
extension UnderlyingLibraryClass: LibraryProtocol {}
extension UnderlyingLibraryClass: UnderlyingLibraryProtocol {}
extension OtherLibraryClass: UnderlyingLibraryProtocol {}
extension OtherLibraryClass: LibraryProtocol {}
extension OtherLibraryClass: OtherLibraryProtocol {} // expected-warning {{extension declares a conformance of imported type 'OtherLibraryClass' to imported protocol 'OtherLibraryProtocol'}}
// expected-note @-1 {{add '@retroactive' to silence this warning}} {{30-50=@retroactive OtherLibraryProtocol}}
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