Initial data commit

Task/Classes/MiniZinc/classes.minizinc

@@ -0,0 +1,28 @@
+% define a Rectangle "class"
+var int: Rectangle(var int: width, var int: height) =
+  let {
+    var int: this;
+    constraint Type(this) = Rectangle; %define the "type" of the instance
+    %define some "instance methods"
+    constraint area(this) = width*height;
+    constraint width(this) = width;
+    constraint height(this) = height;
+  } in this;
+
+%this enum should contain the list of class names
+enum Type = {Rectangle};
+function var Type: Type(var int:a);
+
+%declare the "instance methods"
+function var int: area(var int:this) = let {var int:result;} in result;
+function var int: height(var int:a) = let {var int:result;} in result;
+function var int: width(var int:a) = let {var int:result;} in result;
+
+%create an instance of the "class"
+var int: rect = Rectangle(3,4);
+var int: area1 = area(rect);
+
+solve satisfy;
+
+% print the area of the rectangle
+output [show(area1),"\n"];