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// RUN: %target-typecheck-verify-swift
// REQUIRES: objc_interop
@IBAction // expected-error {{@IBAction may only be used on 'func' declarations}} {{1-11=}}
var iboutlet_global: Int
var iboutlet_accessor: Int {
@IBAction // expected-error {{@IBAction may only be used on 'func' declarations}} {{3-13=}}
get { return 42 }
}
@IBAction // expected-error {{@IBAction may only be used on 'func' declarations}} {{1-11=}}
class IBOutletClassTy {}
@IBAction // expected-error {{@IBAction may only be used on 'func' declarations}} {{1-11=}}
struct IBStructTy {}
@IBAction // expected-error {{only instance methods can be declared @IBAction}} {{1-11=}}
func IBFunction() -> () {}
class IBActionWrapperTy {
@IBAction
func click(_: AnyObject) -> () {} // no-warning
func outer(_: AnyObject) -> () {
@IBAction // expected-error {{only instance methods can be declared @IBAction}} {{5-15=}}
func inner(_: AnyObject) -> () {}
}
@IBAction // expected-error {{@IBAction may only be used on 'func' declarations}} {{3-13=}}
var value : Void = ()
@IBAction
func process(x: AnyObject) -> Int {} // expected-error {{methods declared @IBAction must not return a value}}
// @IBAction does /not/ semantically imply @objc.
@IBAction // expected-note {{attribute already specified here}}
@IBAction // expected-error {{duplicate attribute}}
func doMagic(_: AnyObject) -> () {}
@IBAction @objc
func moreMagic(_: AnyObject) -> () {} // no-warning
@objc @IBAction
func evenMoreMagic(_: AnyObject) -> () {} // no-warning
@available(SwiftStdlib 5.5, *)
@IBAction
func asyncIBActionNoSpace(_: AnyObject) async -> () {}
// expected-error@-1 {{@IBAction instance method cannot be async}}
// expected-note@-2 {{remove 'async' and wrap in 'Task' to use concurrency in 'asyncIBActionNoSpace'}}{{45:3-47:57=@available(SwiftStdlib 5.5, *)\n @IBAction\n func asyncIBActionNoSpace(_: AnyObject) -> () {\nTask { @MainActor in \}\n\}}}
@available(SwiftStdlib 5.5, *)
@IBAction
func asyncIBActionWithFullBody(_: AnyObject) async {
print("Hello World")
}
// expected-error@-3 {{@IBAction instance method cannot be async}}
// expected-note@-4 {{remove 'async' and wrap in 'Task' to use concurrency in 'asyncIBActionWithFullBody'}}{{51:3-55:4=@available(SwiftStdlib 5.5, *)\n @IBAction\n func asyncIBActionWithFullBody(_: AnyObject) {\nTask { @MainActor in\n print("Hello World")\n \}\n\}}}
@available(SwiftStdlib 5.5, *) @IBAction func asyncIBActionNoBody(_: AnyObject) async
// expected-error@-1 {{expected '{' in body of function declaration}}
// expected-error@-2 {{@IBAction instance method cannot be asynchronous}}
// expected-note@-3 {{remove 'async' and wrap in 'Task' to use concurrency in 'asyncIBActionNoBody}}{{3-88=@available(SwiftStdlib 5.5, *) @IBAction func asyncIBActionNoBody(_: AnyObject)}}
}
struct S { }
enum E { }
protocol P1 { }
protocol P2 { }
protocol CP1 : class { }
protocol CP2 : class { }
@objc protocol OP1 { }
@objc protocol OP2 { }
// Teach the compiler that String is @objc-friendly without importing
// Foundation.
extension String: @retroactive _ObjectiveCBridgeable {
@_semantics("convertToObjectiveC") public func _bridgeToObjectiveC() -> AnyObject { fatalError() }
public static func _forceBridgeFromObjectiveC(_ x: AnyObject, result: inout String?) { fatalError() }
public static func _conditionallyBridgeFromObjectiveC(_ x: AnyObject, result: inout String?) -> Bool { fatalError() }
@_effects(readonly) public static func _unconditionallyBridgeFromObjectiveC(_ source: AnyObject? ) -> String { fatalError() }
}
// Check which argument types @IBAction can take.
@objc class X {
// Class type
@IBAction func action1(_: X) {}
@IBAction func action2(_: X?) {}
@IBAction func action3(_: X!) {}
// AnyObject
@IBAction func action4(_: AnyObject) {}
@IBAction func action5(_: AnyObject?) {}
@IBAction func action6(_: AnyObject!) {}
// Any
@IBAction func action4a(_: Any) {}
@IBAction func action5a(_: Any?) {}
@IBAction func action6a(_: Any!) {}
// Protocol types
@IBAction func action7(_: P1) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}} expected-note{{protocol-constrained type containing protocol 'P1' cannot be represented in Objective-C}}
@IBAction func action8(_: CP1) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}} expected-note{{protocol-constrained type containing protocol 'CP1' cannot be represented in Objective-C}}
@IBAction func action9(_: OP1) {}
@IBAction func action10(_: P1?) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action11(_: CP1?) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action12(_: OP1?) {}
@IBAction func action13(_: P1!) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action14(_: CP1!) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action15(_: OP1!) {}
// Class metatype
@IBAction func action15b(_: X.Type) {}
@IBAction func action16(_: X.Type?) {}
@IBAction func action17(_: X.Type!) {}
// AnyClass
@IBAction func action18(_: AnyClass) {}
@IBAction func action19(_: AnyClass?) {}
@IBAction func action20(_: AnyClass!) {}
// Protocol types
@IBAction func action21(_: P1.Type) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action22(_: CP1.Type) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action23(_: OP1.Type) {}
@IBAction func action24(_: P1.Type?) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action25(_: CP1.Type?) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action26(_: OP1.Type?) {}
@IBAction func action27(_: P1.Type!) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action28(_: CP1.Type!) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action29(_: OP1.Type!) {}
// Structs representable in Objective-C
@IBAction func action32(_: Int) {}
@IBAction func action33(_: Int?) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}}
@IBAction func action34(_: String) {}
@IBAction func action35(_: String?) {}
// Other bad cases
@IBAction func action30(_: S) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}} expected-note{{Swift structs cannot be represented in Objective-C}}
@IBAction func action31(_: E) {} // expected-error{{method cannot be marked @IBAction because the type of the parameter cannot be represented in Objective-C}} expected-note{{non-'@objc' enums cannot be represented in Objective-C}}
init() { }
}
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