diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libcore/result.rs | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/libcore/result.rs b/src/libcore/result.rs index ed40a5f31d9..3ac43958c05 100644 --- a/src/libcore/result.rs +++ b/src/libcore/result.rs @@ -540,8 +540,11 @@ impl<T, E> Result<T, E> { /// ``` #[inline] #[unstable(feature = "result_map_or_else", issue = "53268")] - pub fn map_or_else<U, M: FnOnce(T) -> U, F: FnOnce(E) -> U>(self, fallback: F, map: M) -> U { - self.map(map).unwrap_or_else(fallback) + pub fn map_or_else<U, D: FnOnce(E) -> U, F: FnOnce(T) -> U>(self, default: D, f: F) -> U { + match self { + Ok(t) => f(t), + Err(e) => default(e), + } } /// Maps a `Result<T, E>` to `Result<T, F>` by applying a function to a |