Merge pull request #39637 from kavon/caf-actor-test-coverage

Author: swift-ci

test/Concurrency/Runtime/actor_callAsFunction.swift

@@ -0,0 +1,65 @@
+// RUN: %target-run-simple-swift( -Xfrontend -disable-availability-checking -parse-as-library) | %FileCheck %s
+
+// REQUIRES: executable_test
+// REQUIRES: concurrency
+
+// REQUIRES: concurrency_runtime
+// UNSUPPORTED: back_deployment_runtime
+
+enum Maybe<T: Sendable>: Sendable {
+  case just(T)
+  case nothing
+}
+
+@available(SwiftStdlib 5.5, *)
+actor Printer {
+  var numPrints: Int = 0
+  
+  func callAsFunction<T>(_ x: Maybe<T>) async {
+    switch x {
+    case .nothing: genericPrinter("nothing", counter: &numPrints)
+    case .just(let t): genericPrinter(t, counter: &numPrints)
+    }
+  }
+  
+  func callAsFunction(_ x: String) {
+    genericPrinter(x, counter: &numPrints)
+  }
+  
+  func callAsFunction(_ x: Int) async throws {
+    genericPrinter(x, counter: &numPrints)
+  }
+  
+  @MainActor func callAsFunction(writingTo count: inout Maybe<Int>) async {
+    count = .just(await numPrints)
+  }
+  
+  private func genericPrinter<T>(_ x: T, counter: inout Int) {
+    print(x)
+    counter += 1
+  }
+}
+
+@available(SwiftStdlib 5.5, *)
+@main struct Main {
+  static func main() async {
+    let p = Printer()
+    var maybe: Maybe<Int> = .nothing
+    
+    await p(maybe)
+    await p("cat")
+    try! await p(2)
+    await p("cat")
+    
+    
+    await p(writingTo: &maybe)
+    await p(maybe)
+  }
+}
+
+// CHECK: nothing
+// CHECK: cat
+// CHECK: 2
+// CHECK: cat
+// CHECK: 4
+