Merge crate `collections` into `alloc`

1 files changed, 23 insertions, 0 deletions

diff --git a/src/liballoc/btree/mod.rs b/src/liballoc/btree/mod.rs
new file mode 100644
index 00000000000..087c9f228d4
--- /dev/null
+++ b/src/liballoc/btree/mod.rs
@@ -0,0 +1,23 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+mod node;
+mod search;
+pub mod map;
+pub mod set;
+
+#[doc(hidden)]
+trait Recover<Q: ?Sized> {
+    type Key;
+
+    fn get(&self, key: &Q) -> Option<&Self::Key>;
+    fn take(&mut self, key: &Q) -> Option<Self::Key>;
+    fn replace(&mut self, key: Self::Key) -> Option<Self::Key>;
+}