From 2bd87ad432901f3baeab2fc1f2aa8aa328f04ea7 Mon Sep 17 00:00:00 2001
From: Erick Tryzelaar <erick.tryzelaar@gmail.com>
Date: Mon, 9 Sep 2013 19:32:56 -0700
Subject: std: Add Default implementation for vecs

---
 src/libstd/vec.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/libstd')

diff --git a/src/libstd/vec.rs b/src/libstd/vec.rs
index 55b8e3769ea..b91384f0ba5 100644
--- a/src/libstd/vec.rs
+++ b/src/libstd/vec.rs
@@ -104,6 +104,7 @@ use clone::{Clone, DeepClone};
 use container::{Container, Mutable};
 use cmp::{Eq, TotalOrd, Ordering, Less, Equal, Greater};
 use cmp;
+use default::Default;
 use iter::*;
 use libc::c_void;
 use num::{Integer, Zero, CheckedAdd, Saturating};
@@ -2236,6 +2237,19 @@ impl<A: DeepClone> DeepClone for ~[A] {
     }
 }
 
+// This works because every lifetime is a sub-lifetime of 'static
+impl<'self, A> Default for &'self [A] {
+    fn default() -> &'self [A] { &'self [] }
+}
+
+impl<A> Default for ~[A] {
+    fn default() -> ~[A] { ~[] }
+}
+
+impl<A> Default for @[A] {
+    fn default() -> @[A] { @[] }
+}
+
 // This works because every lifetime is a sub-lifetime of 'static
 impl<'self, A> Zero for &'self [A] {
     fn zero() -> &'self [A] { &'self [] }
-- 
cgit 1.4.1-3-g733a5