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// RUN: %target-swift-frontend -swift-version 5 -disable-availability-checking %s -emit-sil -o /dev/null -verify -enable-upcoming-feature DynamicActorIsolation -strict-concurrency=complete -verify-additional-prefix complete-tns-
// REQUIRES: concurrency
// REQUIRES: asserts
protocol Q {
}
do {
class K {}
struct A : @preconcurrency Q {} // Ok
// expected-warning@-1 {{@preconcurrency attribute on conformance to 'Q' has no effect}}
struct B : @preconcurrency K {
// expected-error@-1 {{'preconcurrency' attribute cannot apply to non-protocol type 'K'}}
var x: @preconcurrency Int
// expected-error@-1 {{'preconcurrency' attribute only applies in inheritance clauses}}
}
typealias T = @preconcurrency Q
// expected-error@-1 {{'preconcurrency' attribute only applies in inheritance clauses}}
func test(_: @preconcurrency K) {}
// expected-error@-1 {{'preconcurrency' attribute only applies in inheritance clauses}}
}
protocol InvalidUseOfPreconcurrencyAttr : @preconcurrency Q {
// expected-error@-1 {{'preconcurrency' attribute only applies in inheritance clauses}}
}
struct TestPreconcurrencyAttr {}
extension TestPreconcurrencyAttr : @preconcurrency Q { // Ok
// expected-warning@-1 {{@preconcurrency attribute on conformance to 'Q' has no effect}}
}
class NonSendable {}
protocol TestSendability {
var x: NonSendable { get }
func test(_: NonSendable?) -> [NonSendable]
}
// Make sure that preconcurrency conformances suppress Sendable diagnostics,
// because @preconcurrency assumes that the witness will always be called
// from within the same isolation domain (with a dynamic check).
@MainActor
struct Value : @preconcurrency TestSendability {
var x: NonSendable { NonSendable() }
// expected-note@-1 2 {{property declared here}}
func test(_: NonSendable?) -> [NonSendable] {
// expected-note@-1 2 {{calls to instance method 'test' from outside of its actor context are implicitly asynchronous}}
[]
}
}
// Make sure we don't spuriously say the @preconcurrency is unnecessary.
@MainActor
struct OtherValue : @preconcurrency TestSendability {
var x: NonSendable { NonSendable() }
nonisolated func test(_: NonSendable?) -> [NonSendable] {
[]
}
}
// Make sure that references to actor isolated witness is diagnosed
// expected-note@+1 2 {{add '@MainActor' to make global function 'test(value:)' part of global actor 'MainActor'}}
func test(value: Value) {
_ = value.x
// expected-error@-1 {{main actor-isolated property 'x' can not be referenced from a nonisolated context}}
_ = value.test(nil)
// expected-error@-1 {{call to main actor-isolated instance method 'test' in a synchronous nonisolated context}}
}
actor MyActor {
var value: Value? = nil
}
extension MyActor : @preconcurrency TestSendability {
var x: NonSendable { NonSendable() }
func test(_: NonSendable?) -> [NonSendable] {
[]
}
func test_ref_diagnostics() {
_ = value?.x
// expected-error@-1 {{main actor-isolated property 'x' can not be referenced on a nonisolated actor instance}}
_ = value?.test(nil)
// expected-error@-1 {{call to main actor-isolated instance method 'test' in a synchronous actor-isolated context}}
}
}
protocol Initializable {
init()
// expected-note@-1{{mark the protocol requirement 'init()' 'async' to allow actor-isolated conformances}}
}
final class K : @preconcurrency Initializable {
// expected-warning@-1 {{@preconcurrency attribute on conformance to 'Initializable' has no effect}}
init() {} // Ok
}
@MainActor
final class MainActorK: Initializable {
// expected-note@-1{{add '@preconcurrency' to the 'Initializable' conformance to defer isolation checking to run time}}{{25-25=@preconcurrency }}
init() { } // expected-warning{{main actor-isolated initializer 'init()' cannot be used to satisfy nonisolated protocol requirement}}
// expected-note@-1{{add 'nonisolated' to 'init()' to make this initializer not isolated to the actor}}
}
protocol WithAssoc {
associatedtype T
func test() -> T
}
struct TestConditional<T> {}
extension TestConditional : @preconcurrency WithAssoc where T == Int {
@MainActor func test() -> T { 42 } // Ok
}
@globalActor
struct GlobalActor {
static let shared: MyActor = MyActor()
}
protocol WithIndividuallyIsolatedRequirements {
@MainActor var a: Int { get set }
@GlobalActor var b: Int { get set }
// expected-note@-1 {{'b' declared here}}
@GlobalActor func test()
// expected-note@-1 {{mark the protocol requirement 'test()' 'async' to allow actor-isolated conformances}}
}
do {
@MainActor
struct TestExplicitGlobalActorAttrs : @preconcurrency WithIndividuallyIsolatedRequirements {
// expected-warning@-1 {{@preconcurrency attribute on conformance to 'WithIndividuallyIsolatedRequirements' has no effect}}
var a: Int = 42
@MainActor var b: Int {
// expected-warning@-1 {{main actor-isolated property 'b' cannot be used to satisfy global actor 'GlobalActor'-isolated protocol requirement}}
get { 0 }
set {}
}
@MainActor func test() {
// expected-warning@-1 {{main actor-isolated instance method 'test()' cannot be used to satisfy global actor 'GlobalActor'-isolated protocol requirement}}
}
}
}
@MainActor
protocol WithNonIsolated {
var prop: Int { get set }
// expected-note@-1 {{'prop' declared here}}
nonisolated func test()
// expected-note@-1 {{mark the protocol requirement 'test()' 'async' to allow actor-isolated conformances}}
}
do {
class TestExplicitOtherIsolation : @preconcurrency WithNonIsolated {
// expected-warning@-1 {{@preconcurrency attribute on conformance to 'WithNonIsolated' has no effect}}{{38-54=}}
@GlobalActor var prop: Int = 42
// expected-warning@-1 {{global actor 'GlobalActor'-isolated property 'prop' cannot be used to satisfy main actor-isolated protocol requirement}}
@MainActor func test() {}
// expected-warning@-1 {{main actor-isolated instance method 'test()' cannot be used to satisfy nonisolated protocol requirement}}
}
}
do {
class InferredGlobalActorAttrs : @preconcurrency WithNonIsolated {
// expected-warning@-1 {{@preconcurrency attribute on conformance to 'WithNonIsolated' has no effect}}{{36-52=}}
var prop: Int = 42
func test() {}
}
}
// https://github.com/apple/swift/issues/74294
protocol Parent {
func a()
}
protocol Child: Parent {
func b()
}
do {
actor Test: @preconcurrency Child {
func a() {} // Ok
func b() {} // Ok
}
}
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