From f010f79a6164beab6a3cf920d325b2fb854e1b49 Mon Sep 17 00:00:00 2001
From: Brian Anderson <banderson@mozilla.com>
Date: Sat, 16 Jul 2011 16:59:17 -0700
Subject: [PATCH] Add std::ivec::to_mut, from_mut

---
 src/lib/ivec.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/lib/ivec.rs b/src/lib/ivec.rs
index 677fddc35c5a..31754df8bbda 100644
--- a/src/lib/ivec.rs
+++ b/src/lib/ivec.rs
@@ -72,6 +72,22 @@ fn init_elt_mut[T](&T t, uint n_elts) -> T[mutable] {
     ret v;
 }
 
+fn to_mut[T](&T[] v) -> T[mutable] {
+    auto vres = ~[mutable];
+    for (T t in v) {
+        vres += ~[mutable t];
+    }
+    ret vres;
+}
+
+fn from_mut[T](&T[mutable] v) -> T[] {
+    auto vres = ~[];
+    for (T t in v) {
+        vres += ~[t];
+    }
+    ret vres;
+}
+
 // Predicates
 pred is_empty[T](&T[mutable?] v) -> bool {
     // FIXME: This would be easier if we could just call len