From 3ee4a15e5e1be8d1baa529ccf2c64ba4a88abc93 Mon Sep 17 00:00:00 2001
From: Brian Anderson <banderson@mozilla.com>
Date: Sat, 17 Mar 2012 18:17:27 -0700
Subject: [PATCH] core: Don't copy elements in filter_map

---
 src/libcore/vec.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libcore/vec.rs b/src/libcore/vec.rs
index d69507b75c1..6beda8306e2 100644
--- a/src/libcore/vec.rs
+++ b/src/libcore/vec.rs
@@ -430,11 +430,11 @@ Apply a function to each element of a vector and return the results
 If function `f` returns `none` then that element is excluded from
 the resulting vector.
 "]
-fn filter_map<T: copy, U: copy>(v: [const T], f: fn(T) -> option<U>)
+fn filter_map<T: copy, U: copy>(v: [T], f: fn(T) -> option<U>)
     -> [U] {
     let mut result = [];
     for elem: T in v {
-        alt f(copy elem) {
+        alt f(elem) {
           none {/* no-op */ }
           some(result_elem) { result += [result_elem]; }
         }