Implement Termination for Option<T: Termination>

Author: GuillaumeGomez

src/libstd/process.rs

@@ -1625,6 +1625,16 @@ impl<E: fmt::Debug> Termination for Result<(), E> {
     }
 }
 
+#[unstable(feature = "termination_trait_lib", issue = "43301")]
+impl<T: Termination> Termination for Option<T> {
+    fn report(self) -> i32 {
+        match self {
+            Some(v) => v.report(),
+            None => 1,
+        }
+    }
+}
+
 #[unstable(feature = "termination_trait_lib", issue = "43301")]
 impl Termination for ! {
     fn report(self) -> i32 { self }