File: objc_implementation_features.swift

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// REQUIRES: objc_interop

// RUN: not %target-swift-frontend(mock-sdk: %clang-importer-sdk-nosource) -typecheck %s -import-objc-header %S/Inputs/objc_implementation.h 2>&1 | %FileCheck %s

// CHECK-DAG: objc_implementation_features.swift:[[@LINE+1]]:{{[0-9]+}}: warning: '@_objcImplementation' is deprecated; use '@implementation' instead
@_objcImplementation(EmptyCategory) extension ObjCClass {}

// CHECK-DAG: objc_implementation_features.swift:[[@LINE+2]]:{{[0-9]+}}: warning: extension for main class interface should provide implementation for instance method 'subclassMethod(fromHeader1:)'; this will become an error after adopting '@implementation'
// CHECK-NOT: objc_implementation_features.swift:[[@LINE+1]]:{{[0-9]+}}: warning: '@_objcImplementation' is deprecated; use '@implementation' instead
@_objcImplementation extension ObjCSubclass {}

// CHECK-DAG: objc_implementation_features.swift:[[@LINE+2]]:{{[0-9]+}}: error: extension for main class interface should provide implementation for initializer 'init()'{{$}}
// CHECK-NOT: objc_implementation_features.swift:[[@LINE+1]]:{{[0-9]+}}: error: 'implementation' attribute is only valid when experimental feature ObjCImplementation is enabled
@objc @implementation extension ObjCBasicInitClass {}