// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -parse-as-library -verify %s
// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -parse-as-library -enable-upcoming-feature DeprecateApplicationMain -verify -verify-additional-prefix deprecated- %s

// REQUIRES: objc_interop
// REQUIRES: swift_feature_DeprecateApplicationMain

import UIKit

@UIApplicationMain // expected-error{{'UIApplicationMain' attribute can only apply to one class in a module}}
// expected-deprecated-warning@-1 {{'UIApplicationMain' is deprecated; this is an error in the Swift 6 language mode}}
// expected-deprecated-note@-2 {{use '@main' instead}} {{1-19=@main}}
class MyDelegate1: NSObject, UIApplicationDelegate {
}

@UIApplicationMain // expected-error{{'UIApplicationMain' attribute can only apply to one class in a module}}
// expected-deprecated-warning@-1 {{'UIApplicationMain' is deprecated; this is an error in the Swift 6 language mode}}
// expected-deprecated-note@-2 {{use '@main' instead}} {{1-19=@main}}
class MyDelegate2: NSObject, UIApplicationDelegate {
}

@UIApplicationMain // expected-error{{'UIApplicationMain' attribute can only apply to one class in a module}}
// expected-deprecated-warning@-1 {{'UIApplicationMain' is deprecated; this is an error in the Swift 6 language mode}}
// expected-deprecated-note@-2 {{use '@main' instead}} {{1-19=@main}}
class MyDelegate3: NSObject, UIApplicationDelegate {
}