Implement generalized object and type parameter bounds (Fixes #16462)

src/libsync/comm/mod.rs

@@ -386,6 +386,14 @@ pub struct Receiver<T> {
 /// whenever `next` is called, waiting for a new message, and `None` will be
 /// returned when the corresponding channel has hung up.
 #[unstable]
+#[cfg(not(stage0))]
+pub struct Messages<'a, T:'a> {
+    rx: &'a Receiver<T>
+}
+
+/// Stage0 only
+#[cfg(stage0)]
+#[unstable]
 pub struct Messages<'a, T> {
     rx: &'a Receiver<T>
 }

src/libsync/comm/select.rs

@@ -76,6 +76,24 @@ pub struct Select {
 /// A handle to a receiver which is currently a member of a `Select` set of
 /// receivers.  This handle is used to keep the receiver in the set as well as
 /// interact with the underlying receiver.
+#[cfg(not(stage0))]
+pub struct Handle<'rx, T:'rx> {
+    /// The ID of this handle, used to compare against the return value of
+    /// `Select::wait()`
+    id: uint,
+    selector: &'rx Select,
+    next: *mut Handle<'static, ()>,
+    prev: *mut Handle<'static, ()>,
+    added: bool,
+    packet: &'rx Packet+'rx,
+
+    // due to our fun transmutes, we be sure to place this at the end. (nothing
+    // previous relies on T)
+    rx: &'rx Receiver<T>,
+}
+
+/// Stage0 only
+#[cfg(stage0)]
 pub struct Handle<'rx, T> {
     /// The ID of this handle, used to compare against the return value of
     /// `Select::wait()`
@@ -84,7 +102,7 @@ pub struct Handle<'rx, T> {
     next: *mut Handle<'static, ()>,
     prev: *mut Handle<'static, ()>,
     added: bool,
-    packet: &'rx Packet,
+    packet: &'rx Packet+'rx,
 
     // due to our fun transmutes, we be sure to place this at the end. (nothing
     // previous relies on T)