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// RUN: %target-run-simple-swift
// REQUIRES: executable_test
// REQUIRES: objc_interop
import StdlibUnittest
import Foundation
// Make sure at the end of the file we run the tests.
defer { runAllTests() }
protocol P : class { }
protocol C : class { }
class Foo : NSObject {}
var Casts = TestSuite("Casts")
@inline(never)
func castit<ObjectType>(_ o: NSObject?, _ t: ObjectType.Type) -> ObjectType? {
return o as? ObjectType
}
@inline(never)
func castitExistential<ObjectType>(_ o: C?, _ t: ObjectType.Type) -> ObjectType? {
return o as? ObjectType
}
Casts.test("cast optional<nsobject> to protocol") {
if let obj = castit(nil, P.self) {
print("fail")
expectUnreachable()
} else {
print("success")
}
}
Casts.test("cast optional<nsobject> to protocol meta") {
if let obj = castit(nil, P.Type.self) {
print("fail")
expectUnreachable()
} else {
print("success")
}
}
Casts.test("cast optional<protocol> to protocol") {
if let obj = castitExistential(nil, P.self) {
print("fail")
expectUnreachable()
} else {
print("success")
}
}
Casts.test("cast optional<protocol> to class") {
if let obj = castitExistential(nil, Foo.self) {
print("fail")
expectUnreachable()
} else {
print("success")
}
}
Casts.test("cast optional<protocol> to protocol meta") {
if let obj = castitExistential(nil, P.Type.self) {
expectUnreachable()
print("fail")
} else {
print("success")
}
}
Casts.test("cast optional<protocol> to class meta") {
if let obj = castitExistential(nil, Foo.Type.self) {
expectUnreachable()
print("fail")
} else {
print("success")
}
}
@objc public class ParentType : NSObject {
var a = LifetimeTracked(0)
}
public class ChildType : ParentType {
}
struct SwiftStructWrapper {
var a = LifetimeTracked(0)
}
extension SwiftStructWrapper : _ObjectiveCBridgeable {
typealias _ObjectiveCType = ParentType
func _bridgeToObjectiveC() -> _ObjectiveCType {
return ParentType()
}
static func _forceBridgeFromObjectiveC(
_ source: _ObjectiveCType,
result: inout Self?
) {}
@discardableResult
static func _conditionallyBridgeFromObjectiveC(
_ source: _ObjectiveCType,
result: inout Self?
) -> Bool { return false }
@_effects(readonly)
static func _unconditionallyBridgeFromObjectiveC(_ source: _ObjectiveCType?)
-> Self {
return SwiftStructWrapper()
}
}
Casts.test("testConditionalBridgedCastFromSwiftToNSObjectDerivedClass") {
autoreleasepool {
let s = SwiftStructWrapper()
let z = s as? ChildType
print(z)
}
expectEqual(0, LifetimeTracked.instances)
}
protocol Q {}
class K { }
class D: Q {}
typealias AnyQ = Q & AnyObject
typealias KQ = K & Q
Casts.test("testCastProtocolCompoWithAnyObjectToProtocolCompoTypeSuperclass") {
let shouldBeNil = (D() as AnyQ) as? KQ
expectNil(shouldBeNil)
}
protocol QAny: AnyObject {}
typealias KQAny = K & QAny
class F: QAny {}
Casts.test("testCastProtocolWithAnyObjectToProtocolCompoTypeSuperclass") {
let shouldBeNil = (F() as QAny) as? KQAny
expectNil(shouldBeNil)
}
func f1() -> Any { return 1 }
func attemptFunctionCast<U>(_ u: U.Type) -> U? {
return f1 as? U
}
Casts.test("testFunctionCastToArchetype") {
expectNil(attemptFunctionCast(Int.self))
expectNil(attemptFunctionCast(K.self))
expectTrue(attemptFunctionCast(Any.self) != nil)
}
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