handle possible unknown queues

RomanPodymov · RomanPodymov · commit f6be54a4b856 · 2019-05-11T02:35:34.000+02:00
diff --git a/Sources/Async/Async.swift b/Sources/Async/Async.swift
@@ -762,6 +762,7 @@ public extension DispatchQoS.QoSClass {
             case .utility: return "Utility"
             case .background: return "Background"
             case .unspecified: return "Unspecified"
+            @unknown default: return "Unknown"
             }
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -762,6 +762,7 @@ public extension DispatchQoS.QoSClass {`
`762`	`762`	`case .utility: return "Utility"`
`763`	`763`	`case .background: return "Background"`
`764`	`764`	`case .unspecified: return "Unspecified"`
	`765`	`+ @unknown default: return "Unknown"`
`765`	`766`	`}`
`766`	`767`	`}`
`767`	`768`	`}`