diff options
| -rw-r--r-- | src/libextra/future.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/libextra/future.rs b/src/libextra/future.rs index 2d3da5bb96d..d8f21b46013 100644 --- a/src/libextra/future.rs +++ b/src/libextra/future.rs @@ -61,6 +61,19 @@ 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 { /*! * Executes the future's closure and then returns a borrowed @@ -180,6 +193,12 @@ mod test { } #[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); assert_eq!(*f.get_ref(), 22); |