Add guards for code that relies on _Concurrency (#237)

programmarchy · web-flow · commit 699ada172445 · 2021-10-04T17:20:07.000-07:00
This allows Xcode 13 to still compile on macOS 11 which does not have symbols for Concurrency yet See swift-server/swift-service-lifecycle#110
diff --git a/Sources/AWSLambdaRuntimeCore/LambdaHandler.swift b/Sources/AWSLambdaRuntimeCore/LambdaHandler.swift
@@ -88,7 +88,7 @@ extension LambdaHandler {
 
 // MARK: - AsyncLambdaHandler
 
-#if compiler(>=5.5)
+#if compiler(>=5.5) && canImport(_Concurrency)
 /// Strongly typed, processing protocol for a Lambda that takes a user defined `In` and returns a user defined `Out` async.
 @available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
 public protocol AsyncLambdaHandler: EventLoopLambdaHandler {
diff --git a/Tests/AWSLambdaRuntimeCoreTests/LambdaHandlerTest.swift b/Tests/AWSLambdaRuntimeCoreTests/LambdaHandlerTest.swift
@@ -79,7 +79,7 @@ class LambdaHandlerTest: XCTestCase {
         assertLambdaLifecycleResult(result, shoudHaveRun: maxTimes)
     }
 
-    #if compiler(>=5.5)
+    #if compiler(>=5.5) && canImport(_Concurrency)
 
     // MARK: - AsyncLambdaHandler
 

Original file line number	Diff line number	Diff line change
`@@ -79,7 +79,7 @@ class LambdaHandlerTest: XCTestCase {`
`79`	`79`	`assertLambdaLifecycleResult(result, shoudHaveRun: maxTimes)`
`80`	`80`	`}`
`81`	`81`
`82`		`- #if compiler(>=5.5)`
	`82`	`+ #if compiler(>=5.5) && canImport(_Concurrency)`
`83`	`83`
`84`	`84`	`// MARK: - AsyncLambdaHandler`
`85`	`85`