auto merge of #7410 : luqmana/rust/bare-self, r=catamorphism

Finally sorted this out. Fixes #5321, #4439, and #4850.

src/test/run-pass/issue-5321-immediates-with-bare-self.rs

@@ -0,0 +1,25 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+trait Fooable {
+    fn yes(self);
+}
+
+impl Fooable for uint {
+    fn yes(self) {
+        for self.times {
+            println("yes");
+        }
+    }
+}
+
+fn main() {
+    2.yes();
+}