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// RUN: %target-typecheck-verify-swift
// REQUIRES: objc_interop
import Foundation
// expected-error@+1 {{@IBOutlet property cannot have non-object type 'Int'}}
@IBOutlet // expected-error {{only class instance properties can be declared @IBOutlet}} {{1-11=}}
var iboutlet_global: Int?
@IBOutlet // expected-error {{@IBOutlet may only be used on 'var' declarations}} {{1-11=}}
class IBOutletClassTy {}
@IBOutlet // expected-error {{@IBOutlet may only be used on 'var' declarations}} {{1-11=}}
struct IBStructTy {}
@IBOutlet // expected-error {{@IBOutlet may only be used on 'var' declarations}} {{1-11=}}
func IBFunction() -> () {}
@objc
class IBOutletWrapperTy {
@IBOutlet
var value : IBOutletWrapperTy! = IBOutletWrapperTy() // no-warning
@IBOutlet
class var staticValue: IBOutletWrapperTy? = 52 // expected-error {{cannot convert value of type 'Int' to specified type 'IBOutletWrapperTy?'}}
// expected-error@-2 {{only class instance properties can be declared @IBOutlet}} {{3-12=}}
// expected-error@-2 {{class stored properties not supported}}
@IBOutlet // expected-error {{@IBOutlet may only be used on 'var' declarations}} {{3-13=}}
func click() -> () {}
@IBOutlet // expected-error {{@IBOutlet attribute requires property to be mutable}} {{3-13=}}
let immutable: IBOutletWrapperTy? = nil
@IBOutlet // expected-error {{@IBOutlet attribute requires property to be mutable}} {{3-13=}}
var computedImmutable: IBOutletWrapperTy? {
return nil
}
}
struct S { }
enum E { }
protocol P1 { }
protocol P2 { }
protocol CP1 : class { }
protocol CP2 : class { }
@objc protocol OP1 { }
@objc protocol OP2 { }
class NonObjC {}
// Ensure that only ObjC types work
@objc class X {
// Class type
@IBOutlet var outlet2: X?
@IBOutlet var outlet3: X!
@IBOutlet var outlet2a: NonObjC? // expected-error{{@IBOutlet property cannot have non-'@objc' class type 'NonObjC'}} {{3-13=}}
@IBOutlet var outlet3a: NonObjC! // expected-error{{@IBOutlet property cannot have non-'@objc' class type 'NonObjC'}} {{3-13=}}
// AnyObject
@IBOutlet var outlet5: AnyObject?
@IBOutlet var outlet6: AnyObject!
// Any
@IBOutlet var outlet5a: Any?
@IBOutlet var outlet6a: Any!
// Protocol types
@IBOutlet var outlet10: P1? // expected-error{{@IBOutlet property cannot have non-'@objc' protocol type}} {{3-13=}}
@IBOutlet var outlet11: CP1? // expected-error{{@IBOutlet property cannot have non-'@objc' protocol type}} {{3-13=}}
@IBOutlet var outlet12: OP1?
@IBOutlet var outlet13: P1! // expected-error{{@IBOutlet property cannot have non-'@objc' protocol type}} {{3-13=}}
@IBOutlet var outlet14: CP1! // expected-error{{@IBOutlet property cannot have non-'@objc' protocol type}} {{3-13=}}
@IBOutlet var outlet15: OP1!
// Class metatype
@IBOutlet var outlet16: X.Type? // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet17: X.Type! // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
// AnyClass
@IBOutlet var outlet19: AnyClass? // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet20: AnyClass! // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
// Protocol metatype types
@IBOutlet var outlet24: P1.Type? // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet25: CP1.Type? // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet26: OP1.Type? // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet27: P1.Type! // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet28: CP1.Type! // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet29: OP1.Type! // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
// String
@IBOutlet var outlet33: String?
@IBOutlet var outlet34: String!
// Other bad cases
@IBOutlet var outlet35: S? // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet36: E? // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet37: (X, X)? // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var outlet38: Int? // expected-error{{@IBOutlet property cannot have non-object type}} {{3-13=}}
@IBOutlet var collection1b: [AnyObject]?
@IBOutlet var collection1c: [AnyObject]!
@IBOutlet var collection2b: [X]?
@IBOutlet var collection2c: [X]!
@IBOutlet var collection3b: [OP1]?
@IBOutlet var collection3c: [OP1]!
@IBOutlet var collection4b: ([CP1])? // expected-error{{@IBOutlet property cannot be an array of non-'@objc' protocol type}} {{3-13=}}
@IBOutlet var collection4c: ([CP1])! // expected-error{{@IBOutlet property cannot be an array of non-'@objc' protocol type}} {{3-13=}}
@IBOutlet var collection5b: ([String])?
@IBOutlet var collection5c: ([String])!
@IBOutlet var collection6b: ([NonObjC])? // expected-error{{@IBOutlet property cannot be an array of non-'@objc' class type}} {{3-13=}}
@IBOutlet var collection6c: ([NonObjC])! // expected-error{{@IBOutlet property cannot be an array of non-'@objc' class type}} {{3-13=}}
init() { }
}
// Check that the type is optional
@objc class OX {
// expected-error@+3 {{@IBOutlet property has non-optional type 'OX'}}
// expected-note @+2 {{add '?' to form the optional type 'OX?'}}
// expected-note @+1 {{add '!' to form an implicitly unwrapped optional}}
@IBOutlet var ox: OX
init() { }
}
// Check reference storage types
@objc class RSX {
@IBOutlet weak var rsx1: RSX?
@IBOutlet unowned var rsx2: RSX?
@IBOutlet unowned(unsafe) var rsx3: RSX?
init() { }
}
@objc class Infer {
@IBOutlet var outlet1: Infer!
@IBOutlet weak var outlet2: Infer!
func testOptionalNess() {
_ = outlet1!
_ = outlet2!
}
func testUnchecked() {
_ = outlet1
_ = outlet2
}
// This outlet is strong and optional.
@IBOutlet var outlet4: AnyObject?
func testStrong() {
if outlet4 != nil {}
}
}
// https://github.com/apple/swift/issues/52295
@objc class NonOptionalWeak {
// expected-error@+3 {{@IBOutlet property has non-optional type 'OX'}}
// expected-note @+2 {{add '?' to form the optional type 'OX?'}}
// expected-note @+1 {{add '!' to form an implicitly unwrapped optional}}
@IBOutlet weak var something: OX
init() { }
}
@propertyWrapper
struct MyWrapper {
var wrappedValue: AnyObject {
get { fatalError() }
set { }
}
}
@objc class WrappedIBOutlet {
// Non-optional types are okay with property wrappers.
@IBOutlet @MyWrapper var value: AnyObject
}
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