modernize std::deque

* use a proper exported data type with private fields
* implement core::container::Container
* use the current constructor convention
* use explicit self
* get rid of DVec and the mutable fields

Closes #2343

src/test/bench/graph500-bfs.rs

@@ -23,7 +23,6 @@ use std::time;
 use std::oldmap;
 use std::oldmap::Map;
 use std::oldmap::HashMap;
-use std::deque;
 use std::deque::Deque;
 use std::par;
 use core::io::WriterUtil;
@@ -124,18 +123,18 @@ fn bfs(graph: graph, key: node_id) -> bfs_result {
     let mut marks : ~[node_id]
         = vec::from_elem(vec::len(graph), -1i64);
 
-    let Q = deque::create();
+    let mut q = Deque::new();
 
-    Q.add_back(key);
+    q.add_back(key);
     marks[key] = key;
 
-    while Q.size() > 0 {
-        let t = Q.pop_front();
+    while !q.is_empty() {
+        let t = q.pop_front();
 
         do graph[t].each() |k| {
             if marks[*k] == -1i64 {
                 marks[*k] = t;
-                Q.add_back(*k);
+                q.add_back(*k);
             }
             true
         };

src/test/run-pass/issue-2383.rs

@@ -11,10 +11,9 @@
 // except according to those terms.
 
 extern mod std;
-use std::deque;
 use std::deque::Deque;
 
 pub fn main() {
-    let Q = deque::create();
-    Q.add_back(10);
+    let mut q = Deque::new();
+    q.add_back(10);
 }