From 33923f47e3f90442ae3c604d8ea80992b71611f7 Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@mimiga.net>
Date: Thu, 13 Feb 2014 09:46:46 -0800
Subject: librustc: Remove unique vector patterns from the language.

Preparatory work for removing unique vectors from the language, which is
itself preparatory work for dynamically sized types.
---
 src/libsyntax/util/small_vector.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'src/libsyntax/util/small_vector.rs')

diff --git a/src/libsyntax/util/small_vector.rs b/src/libsyntax/util/small_vector.rs
index 32e5b83ee04..d6cc35a6f9d 100644
--- a/src/libsyntax/util/small_vector.rs
+++ b/src/libsyntax/util/small_vector.rs
@@ -81,7 +81,13 @@ impl<T> SmallVector<T> {
     pub fn expect_one(self, err: &'static str) -> T {
         match self {
             One(v) => v,
-            Many([v]) => v,
+            Many(v) => {
+                if v.len() == 1 {
+                    v.move_iter().next().unwrap()
+                } else {
+                    fail!(err)
+                }
+            }
             _ => fail!(err)
         }
     }
-- 
cgit 1.4.1-3-g733a5