Initial data commit

Task/Abstract-type/Wren/abstract-type.wren

@@ -0,0 +1,33 @@
+import "/fmt" for Fmt
+
+class Beast{
+    kind {}
+    name {}
+    cry() {}
+    print() { System.print("%(name), who's a %(kind), cries: %(Fmt.q(cry())).") }
+}
+
+class Dog is Beast {
+    construct new(kind, name) {
+        _kind = kind
+        _name = name
+    }
+    kind { _kind }
+    name { _name }
+    cry() { "Woof" }
+}
+
+class Cat is Beast {
+    construct new(kind, name) {
+        _kind = kind
+        _name = name
+    }
+    kind { _kind }
+    name { _name }
+    cry() { "Meow" }
+}
+
+var d = Dog.new("labrador", "Max")
+var c = Cat.new("siamese", "Sammy")
+d.print()
+c.print()