Swift 2.2 backport

CarolineCore/Functions.swift

@@ -14,6 +14,7 @@
 
 //MARK: Functions
 extension CarolineTest {
+  #if swift(>=3.0)
     public final func assert(_ condition: @autoclosure () -> Bool,  _ message: @autoclosure () -> String = "Test failed", file: String = #file, line: Int = #line) {
         if !condition() {
             var state = CarolineState(test: self)
@@ -22,4 +23,14 @@ extension CarolineTest {
             print("Test failed at \(file):\(line) - \(message())")
         }
     }
+    #else
+    public final func assert(@autoclosure _ condition: () -> Bool,  @autoclosure _ message: () -> String = "Test failed", file: String = #file, line: Int = #line) {
+        if !condition() {
+            var state = CarolineState(test: self)
+            state.outcome = .Failed
+            state.commit()
+            print("Test failed at \(file):\(line) - \(message())")
+        }
+    }
+    #endif
 }
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