Simple example of anonymous objects from nothing. Closes #812.

src/test/run-pass/anon-obj-no-inner-obj-simple.rs

@@ -0,0 +1,38 @@
+use std;
+
+fn main() {
+
+    // Anonymous object that doesn't extend an existing one.
+    let my_obj = obj() {
+        fn foo() -> int { ret 2; }
+        fn bar() -> int { ret 3; }
+        fn baz() -> str { "hello!" }
+    };
+
+    assert my_obj.foo() == 2;
+    assert my_obj.bar() == 3;
+    assert my_obj.baz() == "hello!";
+
+    // Make sure the result is extendable.
+    let my_ext_obj = obj() {
+        fn foo() -> int { ret 3; }
+        fn quux() -> str { ret self.baz(); }
+        with my_obj
+    };
+
+    assert my_ext_obj.foo() == 3;
+    assert my_ext_obj.bar() == 3;
+    assert my_ext_obj.baz() == "hello!";
+    assert my_ext_obj.quux() == "hello!";
+
+    // And again.
+    let my_ext_ext_obj = obj() {
+        fn baz() -> str { "world!" }
+        with my_ext_obj
+    };
+
+    assert my_ext_ext_obj.foo() == 3;
+    assert my_ext_ext_obj.bar() == 3;
+    assert my_ext_ext_obj.baz() == "world!";
+    assert my_ext_ext_obj.quux() == "world!";
+}