rustc: Implement a new resolve pass behind a compile flag

src/libstd/json.rs

@@ -8,6 +8,7 @@ import io;
 import io::{reader_util, writer_util};
 import map;
 import map::hashmap;
+import core::vec::extensions;
 
 export json;
 export error;

src/libstd/list.rs

@@ -102,6 +102,11 @@ pure fn append<T: copy>(l: @list<T>, m: @list<T>) -> @list<T> {
     }
 }
 
+#[doc = "Push an element to the front of a list"]
+fn push<T: copy>(&l: list<T>, v: T) {
+    l = cons(v, @l);
+}
+
 #[doc = "Iterate over a list"]
 fn iter<T>(l: @list<T>, f: fn(T)) {
     let mut cur = l;

src/libstd/par.rs

@@ -4,6 +4,7 @@ import comm::send;
 import comm::recv;
 import future_spawn = future::spawn;
 import future::future;
+import core::vec::extensions;
 
 export map, mapi, alli, any, mapi_factory;
 

src/libstd/tempfile.rs

@@ -3,6 +3,7 @@
 import core::option;
 import option::{none, some};
 import rand;
+import core::rand::extensions;
 
 fn mkdtemp(prefix: str, suffix: str) -> option<str> {
     let r = rand::rng();

src/libstd/uv_iotask.rs

@@ -7,7 +7,7 @@ The I/O task runs in its own single-threaded scheduler.  By using the
 
 "];
 
-export iotask::{};
+export iotask;
 export spawn_iotask;
 export interact;
 export exit;