From e22d2bc4bc4ed84c72148bdd00c8da0eb4238c45 Mon Sep 17 00:00:00 2001
From: Erick Tryzelaar <erick.tryzelaar@gmail.com>
Date: Tue, 22 Jan 2013 07:51:00 -0800
Subject: [PATCH] core: convert io::Res over to the Drop trait

---
 src/libcore/io.rs | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/libcore/io.rs b/src/libcore/io.rs
index ffe4379b5bc..4b828dd4bc7 100644
--- a/src/libcore/io.rs
+++ b/src/libcore/io.rs
@@ -1108,10 +1108,13 @@ pub mod fsync {
     // Artifacts that need to fsync on destruction
     pub struct Res<t: Copy> {
         arg: Arg<t>,
-        drop {
+    }
+
+    impl<T: Copy> Res<T>: Drop {
+        fn finalize(&self) {
           match self.arg.opt_level {
-            option::None => (),
-            option::Some(level) => {
+            None => (),
+            Some(level) => {
               // fail hard if not succesful
               assert((self.arg.fsync_fn)(self.arg.val, level) != -1);
             }