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Task/Inverted-syntax/Swift/inverted-syntax.swift

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+infix operator ~= {}
+infix operator ! {}
+
+func ~=(lhs:Int, inout rhs:Int) {
+    rhs = lhs
+}
+
+func !(lhs:(() -> Void), rhs:Bool) {
+    if (rhs) {
+        lhs()
+    }
+}
+
+// Traditional assignment
+var a = 0
+
+// Inverted using a custom operator
+20 ~= a
+
+let raining = true
+let tornado = true
+var needUmbrella = false
+var stayInside = false
+
+// Traditional conditional expression
+if raining {needUmbrella = true}
+
+// Inverted using a custom operator
+_ = {stayInside = true} ! tornado