Add a new concatReducers variant

Author: Charlotte Tortorella

ReactiveReSwift.xcodeproj/project.pbxproj

@@ -457,20 +457,23 @@
 				TargetAttributes = {
 					25DBCF361C30BF2B00D63A58 = {
 						CreatedOnToolsVersion = 7.2;
+						LastSwiftMigration = 1020;
 					};
 					25DBCF4D1C30C18D00D63A58 = {
 						CreatedOnToolsVersion = 7.2;
+						LastSwiftMigration = 1020;
 					};
 					25DBCF631C30C1AC00D63A58 = {
 						CreatedOnToolsVersion = 7.2;
+						LastSwiftMigration = 1020;
 					};
 					25DBCF7A1C30C4AA00D63A58 = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1020;
 					};
 					25DBCF861C30C4DB00D63A58 = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1020;
 					};
 					625E66821C1FF97E0027C288 = {
 						CreatedOnToolsVersion = 7.1.1;
@@ -744,6 +747,7 @@
 				PRODUCT_NAME = ReactiveReSwift;
 				SDKROOT = watchos;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 4;
 			};
 			name = Debug;
@@ -765,6 +769,7 @@
 				SDKROOT = watchos;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 4;
 			};
 			name = Release;
@@ -784,6 +789,7 @@
 				PRODUCT_NAME = ReactiveReSwift;
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
 			};
 			name = Debug;
@@ -804,6 +810,7 @@
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
 			};
 			name = Release;
@@ -816,6 +823,8 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "reswift.github.io.ReSwift-tvOSTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = appletvos;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = 3;
 			};
 			name = Debug;
 		};
@@ -828,6 +837,8 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = appletvos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = 3;
 			};
 			name = Release;
 		};
@@ -848,8 +859,7 @@
 				PRODUCT_NAME = ReactiveReSwift;
 				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -870,8 +880,7 @@
 				PRODUCT_NAME = ReactiveReSwift;
 				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -886,8 +895,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "reswift.github.io.ReSwift-MacTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -902,8 +910,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "reswift.github.io.ReSwift-MacTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};

Sources/CoreTypes/Reducer.swift

@@ -11,6 +11,10 @@ import Foundation
 public typealias Reducer<State> = (_ action: Action, _ state: State) -> State
 
 public func concatReducers<State>(_ first: @escaping Reducer<State>, _ rest: Reducer<State>...) -> Reducer<State> {
+    return concatReducers(first: first, rest: rest)
+}
+
+public func concatReducers<State>(first: @escaping Reducer<State>, rest: [Reducer<State>]) -> Reducer<State> {
     return { action, state in
         rest.reduce(first(action, state)) { state, reducer in
             reducer(action, state)

Tests/ReducerTests.swift

@@ -52,7 +52,7 @@ class ReducerTests: XCTestCase {
      it combines the results from each individual reducer correctly
      */
     func testCombinesReducerResults() {
-        let combinedReducer = concatReducers(increaseByOneReducer, increaseByTwoReducer)
+        let combinedReducer = concatReducers(first: increaseByOneReducer, rest: [increaseByTwoReducer])
         let newState = combinedReducer(NoOpAction(), CounterState())
 
         XCTAssertEqual(newState.count, 3)