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31c01eab73
includes a number of QoI things to help people write the correct code. I will commit the testcase for it as the next patch. The bulk of this patch is moving the stdlib, testsuite and validation testsuite to the new syntax. I moved a few uses of "as" patterns back to as? expressions in the stdlib as well. Swift SVN r27959
101 lines
2.7 KiB
Swift
101 lines
2.7 KiB
Swift
// RUN: %target-parse-verify-swift
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// REQUIRES: objc_interop
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class Root : Hashable {
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var hashValue: Int {
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return 0
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}
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}
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func ==(x: Root, y: Root) -> Bool { return true }
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class ObjC : Root {
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var x = 0
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}
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class DerivesObjC : ObjC { }
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struct BridgedToObjC : Hashable, _ObjectiveCBridgeable {
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static func _isBridgedToObjectiveC() -> Bool {
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return true
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}
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static func _getObjectiveCType() -> Any.Type {
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return ObjC.self
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}
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func _bridgeToObjectiveC() -> ObjC {
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return ObjC()
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}
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static func _forceBridgeFromObjectiveC(
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x: ObjC,
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inout result: BridgedToObjC?
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) {
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}
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static func _conditionallyBridgeFromObjectiveC(
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x: ObjC,
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inout result: BridgedToObjC?
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) -> Bool {
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return true
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}
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var hashValue: Int {
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return 0
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}
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}
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func ==(x: BridgedToObjC, y: BridgedToObjC) -> Bool { return true }
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func testUpcastBridge() {
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var setR = Set<Root>()
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var setO = Set<ObjC>()
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var setD = Set<DerivesObjC>()
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var setB = Set<BridgedToObjC>()
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// Upcast to object types.
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setR = setB
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setO = setB
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// Upcast object to bridged type
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setB = setO // expected-error{{cannot assign a value of type 'Set<ObjC>' to a value of type 'Set<BridgedToObjC>'}}
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// Failed upcast
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setD = setB // expected-error{{cannot assign a value of type 'Set<BridgedToObjC>' to a value of type 'Set<DerivesObjC>'}}
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}
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func testForcedDowncastBridge() {
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var setR = Set<Root>()
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var setO = Set<ObjC>()
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var setD = Set<DerivesObjC>()
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var setB = Set<BridgedToObjC>()
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setR as! Set<BridgedToObjC>
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setO as! Set<BridgedToObjC>
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setD as! Set<BridgedToObjC> // expected-error {{'ObjC' is not a subtype of 'DerivesObjC'}}
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// TODO: the diagnostic for the below two examples should indicate that 'as'
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// should be used instead of 'as!'
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setB as! Set<Root> // expected-error {{'Root' is not a subtype of 'BridgedToObjC'}}
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setB as! Set<ObjC> // expected-error {{'ObjC' is not a subtype of 'BridgedToObjC'}}
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setB as! Set<DerivesObjC> // expected-error {{'DerivesObjC' is not a subtype of 'BridgedToObjC'}}
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}
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func testConditionalDowncastBridge() {
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var setR = Set<Root>()
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var setO = Set<ObjC>()
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var setD = Set<DerivesObjC>()
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var setB = Set<BridgedToObjC>()
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if let s = setR as? Set<BridgedToObjC> { }
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if let s = setO as? Set<BridgedToObjC> { }
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if let s = setD as? Set<BridgedToObjC> { } // expected-error {{'ObjC' is not a subtype of 'DerivesObjC'}}
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if let s = setB as? Set<Root> { } // expected-error {{'Root' is not a subtype of 'BridgedToObjC'}}
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if let s = setB as? Set<ObjC> { } // expected-error {{'ObjC' is not a subtype of 'BridgedToObjC'}}
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if let s = setB as? Set<DerivesObjC> { } // expected-error {{'DerivesObjC' is not a subtype of 'BridgedToObjC'}}
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}
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