---

yaml
---
r: 64491
b: refs/heads/snap-stage3
c: eb74f0c
h: refs/heads/master
i:
  64489: 18fd3d7
  64487: 271148a
v: v3

Author: Thiez

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: 2d28d645422c1617be58c8ca7ad9a457264ca850
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
-refs/heads/snap-stage3: ddd8c156c650347267e4b02938f8efb207cb2150
+refs/heads/snap-stage3: eb74f0ccf60a1e8dda1afe9a3be0e8dd4fd96f9f
 refs/heads/try: 7b78b52e602bb3ea8174f9b2006bff3315f03ef9
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b

branches/snap-stage3/src/libextra/future.rs

@@ -60,6 +60,19 @@ impl<A:Clone> Future<A> {
     }
 }
 
+impl<A> Future<A> {
+    /// Gets the value from this future, forcing evaluation.
+    pub fn unwrap(self) -> A {
+        let mut this = self;
+        this.get_ref();
+        let state = replace(&mut this.state, Evaluating);
+        match state {
+            Forced(v) => v,
+            _ => fail!( "Logic error." ),
+        }
+    }
+}
+
 impl<A> Future<A> {
     pub fn get_ref<'a>(&'a mut self) -> &'a A {
         /*!
@@ -179,6 +192,12 @@ mod test {
         assert_eq!(f.get(), ~"fail");
     }
 
+    #[test]
+    fn test_interface_unwrap() {
+        let mut f = from_value(~"fail");
+        assert_eq!(f.unwrap(), ~"fail");
+    }
+
     #[test]
     fn test_get_ref_method() {
         let mut f = from_value(22);