From b7832ed0b42a2d6512e3f8d09605986237f02ed5 Mon Sep 17 00:00:00 2001
From: Huon Wilson <dbau.pp+github@gmail.com>
Date: Tue, 30 Dec 2014 21:01:36 +1100
Subject: Implement `Clone` for a large number of iterators & other adaptors.

It's useful to be able to save state.
---
 src/libstd/io/fs.rs   | 1 +
 src/libstd/io/util.rs | 2 ++
 2 files changed, 3 insertions(+)

(limited to 'src/libstd/io')

diff --git a/src/libstd/io/fs.rs b/src/libstd/io/fs.rs
index f2db2875ebf..5b5c1fbcec7 100644
--- a/src/libstd/io/fs.rs
+++ b/src/libstd/io/fs.rs
@@ -558,6 +558,7 @@ pub fn walk_dir(path: &Path) -> IoResult<Directories> {
 }
 
 /// An iterator that walks over a directory
+#[deriving(Clone)]
 pub struct Directories {
     stack: Vec<Path>,
 }
diff --git a/src/libstd/io/util.rs b/src/libstd/io/util.rs
index 43893ca0126..3624f14e440 100644
--- a/src/libstd/io/util.rs
+++ b/src/libstd/io/util.rs
@@ -163,6 +163,7 @@ impl Writer for MultiWriter {
 
 /// A `Reader` which chains input from multiple `Reader`s, reading each to
 /// completion before moving onto the next.
+#[deriving(Clone)]
 pub struct ChainedReader<I, R> {
     readers: I,
     cur_reader: Option<R>,
@@ -246,6 +247,7 @@ pub fn copy<R: Reader, W: Writer>(r: &mut R, w: &mut W) -> io::IoResult<()> {
 }
 
 /// An adaptor converting an `Iterator<u8>` to a `Reader`.
+#[deriving(Clone)]
 pub struct IterReader<T> {
     iter: T,
 }
-- 
cgit 1.4.1-3-g733a5