feat: add isolation inheritance

Author: ph1ps

.swiftpm/xcode/xcshareddata/xcschemes/swift-concurrency-deadline.xcscheme

@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1600"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES"
+      buildArchitectures = "Automatic">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "Deadline"
+               BuildableName = "Deadline"
+               BlueprintName = "Deadline"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      shouldAutocreateTestPlan = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "DeadlineTests"
+               BuildableName = "DeadlineTests"
+               BlueprintName = "DeadlineTests"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "Deadline"
+            BuildableName = "Deadline"
+            BlueprintName = "Deadline"
+            ReferencedContainer = "container:">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Sources/Deadline/Deadline.swift

@@ -73,14 +73,16 @@ public func withDeadline<C, R>(
   until instant: C.Instant,
   tolerance: C.Instant.Duration? = nil,
   clock: C,
+  isolation: isolated (any Actor)? = #isolation,
   operation: @Sendable () async throws -> R
 ) async throws -> R where C: Clock, R: Sendable {
 
   // NB: This is safe to use, because the closure will not escape the context of this function.
   let result = await withoutActuallyEscaping(operation) { operation in
     await withTaskGroup(
       of: DeadlineState<R>.self,
-      returning: Result<R, any Error>.self
+      returning: Result<R, any Error>.self,
+      isolation: isolation
     ) { taskGroup in
 
       taskGroup.addTask {
@@ -191,7 +193,8 @@ public func withDeadline<C, R>(
 public func withDeadline<R>(
   until instant: ContinuousClock.Instant,
   tolerance: ContinuousClock.Instant.Duration? = nil,
+  isolation: isolated (any Actor)? = #isolation,
   operation: @Sendable () async throws -> R
 ) async throws -> R where R: Sendable {
-  try await withDeadline(until: instant, tolerance: tolerance, clock: ContinuousClock(), operation: operation)
+  try await withDeadline(until: instant, tolerance: tolerance, clock: ContinuousClock(), isolation: isolation, operation: operation)
 }