Conditional import for building with earlier SDKs.

Author: andersio

Loop/Public/SwiftUI/EnvironmentLoop.swift

@@ -1,3 +1,5 @@
+#if canImport(SwiftUI) && canImport(Combine)
+
 import SwiftUI
 import Combine
 import ReactiveSwift
@@ -47,3 +49,5 @@ public struct EnvironmentLoop<State, Event>: DynamicProperty {
         acknowledgedState = subscription.latestValue
     }
 }
+
+#endif

Loop/Public/SwiftUI/EnvironmentValues.swift

@@ -1,3 +1,5 @@
+#if canImport(SwiftUI)
+
 import SwiftUI
 
 @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
@@ -26,3 +28,5 @@ internal enum LoopEnvironmentKey: EnvironmentKey {
         return [:]
     }
 }
+
+#endif

Loop/Public/SwiftUI/LoopBinding.swift

@@ -1,3 +1,5 @@
+#if canImport(SwiftUI) && canImport(Combine)
+
 import SwiftUI
 import Combine
 import ReactiveSwift
@@ -47,3 +49,5 @@ public struct LoopBinding<State, Event>: DynamicProperty {
         loop.send(event)
     }
 }
+
+#endif

Loop/Public/SwiftUI/SwiftUISubscription.swift

@@ -1,4 +1,6 @@
 import SwiftUI
+#if canImport(Combine)
+
 import Combine
 import ReactiveSwift
 
@@ -30,3 +32,5 @@ internal final class SwiftUISubscription<State, Event>: ObservableObject {
             }
     }
 }
+
+#endif