E language with samples

samples/E/Extends.E

@@ -0,0 +1,31 @@
+# from
+# http://wiki.erights.org/wiki/Walnut/Ordinary_Programming/Objects_and_Functions
+def makeVehicle(self) {
+    def vehicle {
+        to milesTillEmpty() {
+            return self.milesPerGallon() * self.getFuelRemaining()
+        }
+    }
+    return vehicle
+}
+
+def makeCar() {
+    var fuelRemaining := 20
+    def car extends makeVehicle(car) {
+        to milesPerGallon() {return 19}
+        to getFuelRemaining() {return fuelRemaining}
+    }
+    return car
+}
+
+def makeJet() {
+    var fuelRemaining := 2000
+    def jet extends makeVehicle(jet) {
+        to milesPerGallon() {return 2}
+        to getFuelRemaining() {return fuelRemaining}
+    }
+    return jet
+}
+
+def car := makeCar()
+println(`The car can go ${car.milesTillEmpty()} miles.`)