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// RUN: %target-swift-frontend -typecheck -verify -enable-experimental-distributed -target %target-swift-5.7-abi-triple -I %t 2>&1 %s
// UNSUPPORTED: back_deploy_concurrency
// REQUIRES: concurrency
// REQUIRES: distributed
import Distributed
distributed actor DA {
// expected-error@-1{{distributed actor 'DA' does not declare ActorSystem it can be used with}}
// expected-error@-2 {{type 'DA' does not conform to protocol 'DistributedActor'}}
// expected-note@-3 {{add stubs for conformance}}
// expected-note@-4{{you can provide a module-wide default actor system by declaring:}}
// Note to add the typealias is diagnosed on the protocol:
// _Distributed.DistributedActor:3:20: note: diagnostic produced elsewhere: protocol requires nested type 'ActorSystem'; do you want to add it?
}
// When an actor declares a typealias for a system, but that system does not exist,
// we need to fail gracefully, rather than crash trying to use the non-existing type.
//
// Test case for: https://github.com/apple/swift/issues/58663
distributed actor Server { // expected-error 2 {{distributed actor 'Server' does not declare ActorSystem it can be used with}}
// expected-error@-1 {{type 'Server' does not conform to protocol 'DistributedActor'}}
// expected-note@-2{{you can provide a module-wide default actor system by declaring:}}
// expected-note@-3 {{add stubs for conformance}}
typealias ActorSystem = DoesNotExistDataSystem
// expected-error@-1{{cannot find type 'DoesNotExistDataSystem' in scope}}
typealias SerializationRequirement = any Codable
distributed func send() { }
}
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