1 files changed, 28 insertions, 0 deletions
diff --git a/tiger-compiler/tests/object/good/override.tig b/tiger-compiler/tests/object/good/override.tig
new file mode 100755
index 0000000..550d3cd
--- /dev/null
+++ b/tiger-compiler/tests/object/good/override.tig
@@ -0,0 +1,28 @@
+let
+  class C
+  {
+    var a := 0
+    method m() : int = self.a
+  }
+  class D extends C
+  {
+    var b := 9
+    /* Override C.m().  */
+    method m() : int = self.a + self.b
+  }
+  var d : D := new D
+  /* Valid upcast due to inclusion polymorphism.  */
+  var c : C := d
+  in
+    c.a := 42;
+    /* Note that accessing `c.b' is not allowed, since `c' is
+         statically known as a `C', even though it is actually a `D'
+         at run time.  */
+    let
+      /* Polymorphic call.  */
+    var res := c.m()
+    in
+      print_int(res);
+      print("\n")
+    end
+end
+\ No newline at end of file