Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/SSignalKit/SwiftSignalKit/Source/Signal_Single.swift

@@ -0,0 +1,32 @@
+import Foundation
+
+public func single<T, E>(_ value: T, _ errorType: E.Type) -> Signal<T, E> {
+    return Signal<T, E> { subscriber in
+        subscriber.putNext(value)
+        subscriber.putCompletion()
+        
+        return EmptyDisposable
+    }
+}
+
+public func fail<T, E>(_ valueType: T.Type, _ error: E) -> Signal<T, E> {
+    return Signal<T, E> { subscriber in
+        subscriber.putError(error)
+        
+        return EmptyDisposable
+    }
+}
+
+public func complete<T, E>(_ valueType: T.Type, _ error: E.Type) -> Signal<T, E> {
+    return Signal<T, E> { subscriber in
+        subscriber.putCompletion()
+        
+        return EmptyDisposable
+    }
+}
+
+public func never<T, E>(_ valueType: T.Type, _ error: E.Type) -> Signal<T, E> {
+    return Signal { _ in
+        return EmptyDisposable
+    }
+}