std: Add Option.{result_or_default,or_default} that uses Default

1 files changed, 20 insertions, 0 deletions

diff --git a/src/libstd/option.rs b/src/libstd/option.rs
index 1f3a31a403c..84d8a3aa188 100644
--- a/src/libstd/option.rs
+++ b/src/libstd/option.rs
@@ -350,6 +350,26 @@ impl<T> Option<T> {
     }
 }
 
+impl<T: Default> Option<T> {
+    /// Returns the contained value or default (for this type)
+    #[inline]
+    pub fn unwrap_or_default(self) -> T {
+        match self {
+            Some(x) => x,
+            None => Default::default()
+        }
+    }
+
+    /// Returns self or `Some`-wrapped default value
+    #[inline]
+    pub fn or_default(self) -> Option<T> {
+        match self {
+            None => Some(Default::default()),
+            x => x,
+        }
+    }
+}
+
 impl<T> Default for Option<T> {
     fn default() -> Option<T> { None }
 }