Expand ItemDecorator extensions in all contexts

Now that fold_item can return multiple items, this is pretty trivial. It
also recursively expands generated items so ItemDecorators can generate
items that are tagged with ItemDecorators!

Closes #4913

1 files changed, 7 insertions, 1 deletions

diff --git a/src/libsyntax/util/small_vector.rs b/src/libsyntax/util/small_vector.rs
index e0d7fdd8790..32e5b83ee04 100644
--- a/src/libsyntax/util/small_vector.rs
+++ b/src/libsyntax/util/small_vector.rs
@@ -1,4 +1,4 @@
-// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
@@ -64,6 +64,12 @@ impl<T> SmallVector<T> {
         }
     }
 
+    pub fn push_all(&mut self, other: SmallVector<T>) {
+        for v in other.move_iter() {
+            self.push(v);
+        }
+    }
+
     pub fn get<'a>(&'a self, idx: uint) -> &'a T {
         match *self {
             One(ref v) if idx == 0 => v,